Number - Lowest Common Multiples
Question 1
List the first $5$ multiples of each number and find their lowest common multiple
a) $2,3$
a
$6$
Question ID: 10320010010
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b) $3,4$
a
$12$
Question ID: 10320010020
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c) $6,8$
a
$24$
Question ID: 10320010030
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d) $4,8$
a
$8$
Question ID: 10320010040
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e) $6,10$
a
$30$
Question ID: 10320010050
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f) $8,12$
a
$24$
Question ID: 10320010060
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g) $15,20$
a
$60$
Question ID: 10320010070
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h) $30,50$
a
$150$
Question ID: 10320010080
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Question 2
List the first $6$ multiples of each number and find their lowest common multiple
a) $2,3,4$
a
$12$
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b) $4,6,8$
a
$24$
Question ID: 10320020020
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c) $5,6,10$
a
$30$
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d) $6,9,12$
a
$36$
Question ID: 10320020040
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e) $5,8,20$
a
$40$
Question ID: 10320020050
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f) $10,12,15$
a
$60$
Question ID: 10320020060
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Question 3
List the first $15$ multiples of each number and find their lowest common multiple
a) $2,3,5$
a
$30$
Question ID: 10320030010
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b) $2,3,7$
a
$42$
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c) $4,7,9$
a
$56$
Question ID: 10320030030
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d) $4,5,6$
a
$60$
Question ID: 10320030040
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e) $3,4,10$
a
$60$
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Question 4
List the first $10$ multiples of each number and find their lowest common multiple
a) $9,15$
a
$45$
Question ID: 10320040010
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b) $12,14$
a
$84$
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c) $16,24$
a
$48$
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d) $12,21$
a
$84$
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e) $14,16$
a
$112$
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f) $15,80$
a
$90$
Question ID: 10320040060
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g) $24,28$
a
$168$
Question ID: 10320040070
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h) $42,60$
a
$420$
Question ID: 10320040080
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Question 5
By finding prime factors, find the lowest common multiple of:
a) $14,15$
a
$210$
Question ID: 10320050010
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b) $15,22$
a
$330$
Question ID: 10320050020
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c) $20,44$
a
$220$
Question ID: 10320050030
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d) $21,35$
a
$105$
Question ID: 10320050040
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e) $28,30$
a
$420$
Question ID: 10320050050
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f) $14,25$
a
$350$
Question ID: 10320050060
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g) $15,32$
a
$480$
Question ID: 10320050070
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h) $12,52$
a
$156$
Question ID: 10320050080
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Question 6
By finding prime factors, find the lowest common multiple of:
a) $12,15,16$
a
$240$
Question ID: 10320060010
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b) $15,16,32$
a
$480$
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c) $20,24,32$
a
$480$
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d) $15,20,25$
a
$300$
Question ID: 10320060040
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e) $28,42,63$
a
$252$
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f) $24,32,40$
a
$480$
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g) $24,30,54$
a
$1080$
Question ID: 10320060070
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h) $39,65,78$
a
$390$
Question ID: 10320060080
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Question 7
By finding prime factors, find the lowest common multiple of:
a) $42,68$
a
$1428$
Question ID: 10320070010
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b) $92,100$
a
$2300$
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c) $45,66$
a
$990$
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d) $85,98$
a
$8330$
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e) $36,55$
a
$1980$
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f) $44,105$
a
$4620$
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g) $46,87$
a
$4002$
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h) $67,91$
a
$6097$
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Question 8
By finding prime factors, find the lowest common multiple of:
a) $20,35,40$
a
$3080$
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b) $18,25,38$
a
$8550$
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c) $52,68,78$
a
$2652$
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d) $36,64,78$
a
$7488$
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e) $35,52,98$
a
$12740$
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f) $104,105,112$
a
$21840$
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g) $85,130,200$
a
$44200$
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h) $17,62,99$
a
$104346$
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Question 9
Answer the following
a) Consider the following list of prime factors:
$30=2\times3\times5$
$42=2\times3\times7$
Find the Lowest Common Multiple of $30$ and $42$
a
$210$
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b) Consider the following list of prime factors:
$70=2\times5\times7$
$105=3\times5\times7$
Find the Lowest Common Multiple of $70$ and $105$
a
$210$
Question ID: 10320090020
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c) Consider the following list of prime factors:
$12=2\times2\times3$
$66=2\times3\times11$
Find the Lowest Common Multiple of $12$ and $66$
a
$132$
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d) Consider the following list of prime factors:
$90=2\times3\times3\times5$
$56=2\times2\times2\times7$
Find the Lowest Common Multiple of $90$ and $56$
a
$2520$
Question ID: 10320090040
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Question 10
Find what is missing from the boxes
a) Consider the following list of prime factors:
$30=2\times3\times5$
$105=3\times5\times7$
The Lowest Common Multiple of $30$ and $105=2\times\square\times5\times7$
a
$3$
Question ID: 10320100010
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b) Consider the following list of prime factors:
$20=2\times2\times5$
$18=2\times3\times3$
The Lowest Common Multiple of $20$ and $18$ is $2\times2\times\square\times\square\times\square$
a
$3,3,5$
Question ID: 10320100020
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c) Consider the following list of prime factors:
$56=2^3\times7$
$70=2\times5\times7$
The Lowest Common Multiple of $56$ and $70$ is $\square\times\square\times\square\times5\times7$
a
$2,2,2$
Question ID: 10320100030
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d) Consider the following list of prime factors:
$495=3^2\times5\times11$
$825=3\times5^2\times11$
The Lowest Common Multiple of $495$ and $825$ is $3^2\times\square^2\times\square$
a
$5,11$
Question ID: 10320100040
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Question 1
List the first $5$ multiples of each number and find their lowest common multiple
a) $2,3$
b) $3,4$
c) $6,8$
d) $4,8$
e) $6,10$
f) $8,12$
g) $15,20$
h) $30,50$
Question 2
List the first $6$ multiples of each number and find their lowest common multiple
a) $2,3,4$
b) $4,6,8$
c) $5,6,10$
d) $6,9,12$
e) $5,8,20$
f) $10,12,15$
Question 3
List the first $15$ multiples of each number and find their lowest common multiple
a) $2,3,5$
b) $2,3,7$
c) $4,7,9$
d) $4,5,6$
e) $3,4,10$
Question 4
List the first $10$ multiples of each number and find their lowest common multiple
a) $9,15$
b) $12,14$
c) $16,24$
d) $12,21$
e) $14,16$
f) $15,80$
g) $24,28$
h) $42,60$
Question 5
By finding prime factors, find the lowest common multiple of:
a) $14,15$
b) $15,22$
c) $20,44$
d) $21,35$
e) $28,30$
f) $14,25$
g) $15,32$
h) $12,52$
Question 6
By finding prime factors, find the lowest common multiple of:
a) $12,15,16$
b) $15,16,32$
c) $20,24,32$
d) $15,20,25$
e) $28,42,63$
f) $24,32,40$
g) $24,30,54$
h) $39,65,78$
Question 7
By finding prime factors, find the lowest common multiple of:
a) $42,68$
b) $92,100$
c) $45,66$
d) $85,98$
e) $36,55$
f) $44,105$
g) $46,87$
h) $67,91$
Question 8
By finding prime factors, find the lowest common multiple of:
a) $20,35,40$
b) $18,25,38$
c) $52,68,78$
d) $36,64,78$
e) $35,52,98$
f) $104,105,112$
g) $85,130,200$
h) $17,62,99$
Question 9
Answer the following
a) Consider the following list of prime factors:
$30=2\times3\times5$
$42=2\times3\times7$
Find the Lowest Common Multiple of $30$ and $42$
b) Consider the following list of prime factors:
$70=2\times5\times7$
$105=3\times5\times7$
Find the Lowest Common Multiple of $70$ and $105$
c) Consider the following list of prime factors:
$12=2\times2\times3$
$66=2\times3\times11$
Find the Lowest Common Multiple of $12$ and $66$
d) Consider the following list of prime factors:
$90=2\times3\times3\times5$
$56=2\times2\times2\times7$
Find the Lowest Common Multiple of $90$ and $56$
Question 10
Find what is missing from the boxes
a) Consider the following list of prime factors:
$30=2\times3\times5$
$105=3\times5\times7$
The Lowest Common Multiple of $30$ and $105=2\times\square\times5\times7$
b) Consider the following list of prime factors:
$20=2\times2\times5$
$18=2\times3\times3$
The Lowest Common Multiple of $20$ and $18$ is $2\times2\times\square\times\square\times\square$
c) Consider the following list of prime factors:
$56=2^3\times7$
$70=2\times5\times7$
The Lowest Common Multiple of $56$ and $70$ is $\square\times\square\times\square\times5\times7$
d) Consider the following list of prime factors:
$495=3^2\times5\times11$
$825=3\times5^2\times11$
The Lowest Common Multiple of $495$ and $825$ is $3^2\times\square^2\times\square$
Answers
Question 1
a) $6$
b) $12$
c) $24$
d) $8$
e) $30$
f) $24$
g) $60$
h) $150$
Question 2
a) $12$
b) $24$
c) $30$
d) $36$
e) $40$
f) $60$
Question 3
a) $30$
b) $42$
c) $56$
d) $60$
e) $60$
Question 4
a) $45$
b) $84$
c) $48$
d) $84$
e) $112$
f) $90$
g) $168$
h) $420$
Question 5
a) $210$
b) $330$
c) $220$
d) $105$
e) $420$
f) $350$
g) $480$
h) $156$
Question 6
a) $240$
b) $480$
c) $480$
d) $300$
e) $252$
f) $480$
g) $1080$
h) $390$
Question 7
a) $1428$
b) $2300$
c) $990$
d) $8330$
e) $1980$
f) $4620$
g) $4002$
h) $6097$
Question 8
a) $3080$
b) $8550$
c) $2652$
d) $7488$
e) $12740$
f) $21840$
g) $44200$
h) $104346$
Question 9
a) $210$
b) $210$
c) $132$
d) $2520$
Question 10
a) $3$
b) $3,3,5$
c) $2,2,2$
d) $5,11$
Question 1
List the first $5$ multiples of each number and find their lowest common multiple
a) $2,3$
b) $3,4$
c) $6,8$
d) $4,8$
e) $6,10$
f) $8,12$
g) $15,20$
h) $30,50$
Question 2
List the first $6$ multiples of each number and find their lowest common multiple
a) $2,3,4$
b) $4,6,8$
c) $5,6,10$
d) $6,9,12$
e) $5,8,20$
f) $10,12,15$
Question 3
List the first $15$ multiples of each number and find their lowest common multiple
a) $2,3,5$
b) $2,3,7$
c) $4,7,9$
d) $4,5,6$
e) $3,4,10$
Question 4
List the first $10$ multiples of each number and find their lowest common multiple
a) $9,15$
b) $12,14$
c) $16,24$
d) $12,21$
e) $14,16$
f) $15,80$
g) $24,28$
h) $42,60$
Question 5
By finding prime factors, find the lowest common multiple of:
a) $14,15$
b) $15,22$
c) $20,44$
d) $21,35$
e) $28,30$
f) $14,25$
g) $15,32$
h) $12,52$
Question 6
By finding prime factors, find the lowest common multiple of:
a) $12,15,16$
b) $15,16,32$
c) $20,24,32$
d) $15,20,25$
e) $28,42,63$
f) $24,32,40$
g) $24,30,54$
h) $39,65,78$
Question 7
By finding prime factors, find the lowest common multiple of:
a) $42,68$
b) $92,100$
c) $45,66$
d) $85,98$
e) $36,55$
f) $44,105$
g) $46,87$
h) $67,91$
Question 8
By finding prime factors, find the lowest common multiple of:
a) $20,35,40$
b) $18,25,38$
c) $52,68,78$
d) $36,64,78$
e) $35,52,98$
f) $104,105,112$
g) $85,130,200$
h) $17,62,99$
Question 9
Answer the following
a) Consider the following list of prime factors:
$30=2\times3\times5$
$42=2\times3\times7$
Find the Lowest Common Multiple of $30$ and $42$
b) Consider the following list of prime factors:
$70=2\times5\times7$
$105=3\times5\times7$
Find the Lowest Common Multiple of $70$ and $105$
c) Consider the following list of prime factors:
$12=2\times2\times3$
$66=2\times3\times11$
Find the Lowest Common Multiple of $12$ and $66$
d) Consider the following list of prime factors:
$90=2\times3\times3\times5$
$56=2\times2\times2\times7$
Find the Lowest Common Multiple of $90$ and $56$
Question 10
Find what is missing from the boxes
a) Consider the following list of prime factors:
$30=2\times3\times5$
$105=3\times5\times7$
The Lowest Common Multiple of $30$ and $105=2\times\square\times5\times7$
b) Consider the following list of prime factors:
$20=2\times2\times5$
$18=2\times3\times3$
The Lowest Common Multiple of $20$ and $18$ is $2\times2\times\square\times\square\times\square$
c) Consider the following list of prime factors:
$56=2^3\times7$
$70=2\times5\times7$
The Lowest Common Multiple of $56$ and $70$ is $\square\times\square\times\square\times5\times7$
d) Consider the following list of prime factors:
$495=3^2\times5\times11$
$825=3\times5^2\times11$
The Lowest Common Multiple of $495$ and $825$ is $3^2\times\square^2\times\square$
Answers
Question 1
a) $6$
b) $12$
c) $24$
d) $8$
e) $30$
f) $24$
g) $60$
h) $150$
Question 2
a) $12$
b) $24$
c) $30$
d) $36$
e) $40$
f) $60$
Question 3
a) $30$
b) $42$
c) $56$
d) $60$
e) $60$
Question 4
a) $45$
b) $84$
c) $48$
d) $84$
e) $112$
f) $90$
g) $168$
h) $420$
Question 5
a) $210$
b) $330$
c) $220$
d) $105$
e) $420$
f) $350$
g) $480$
h) $156$
Question 6
a) $240$
b) $480$
c) $480$
d) $300$
e) $252$
f) $480$
g) $1080$
h) $390$
Question 7
a) $1428$
b) $2300$
c) $990$
d) $8330$
e) $1980$
f) $4620$
g) $4002$
h) $6097$
Question 8
a) $3080$
b) $8550$
c) $2652$
d) $7488$
e) $12740$
f) $21840$
g) $44200$
h) $104346$
Question 9
a) $210$
b) $210$
c) $132$
d) $2520$
Question 10
a) $3$
b) $3,3,5$
c) $2,2,2$
d) $5,11$
Solutions
Question 1
a)
b)
c)
d)
e)
f)
g)
h)
Question 2
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b)
c)
d)
e)
f)
Question 3
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b)
c)
d)
e)
Question 4
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b)
c)
d)
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f)
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h)
Question 5
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b)
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d)
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f)
g)
h)
Question 6
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f)
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h)
Question 7
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d)
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Question 8
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h)
Question 9
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b)
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d)
Question 10
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b)
c)
d)