Common Multiples

Q.

Find the LCM and HCF of the following pair of integers and verify that LCM$\times$HCF$=$ the product of the two numbers.

$26$and $91$

Q.

Question 3 (a)

Find the first three common multiples of:
6 and 8

Q.

Question 3 (b)

Find the first three common multiples of:
12 and 18

Q.

Find the greatest number which divides 34, 60 And 85 leaving remainder 7, 6 and 4 respectively

Q.

Find the LCM of $\frac{1}{4}$, $\frac{2}{5}$ and $\frac{7}{20}$.

1. 14

2. 12

3. $\frac{1}{14}$

4. $\frac{7}{20}$

Q.

Write all the numbers less than hundred which are common multiples of 3 and 4.

Q. Write all the numbers less than $100$ which are common multiples of $3$ and $4$.

Q.

Question 194

Three brands A, B and C of biscuits are available in packets of 12, 15, and 21 biscuits, respectively. If a shopkeeper wants to buy an equal number of biscuits of each brand, what is the minimum number of packets of each brand, he should buy?

Q.

Using common multiple method, find the L.C.M of $36,48,72$ and $90$.

Q.

Which of the following is a multiple of 11?

1. 72

2. 56

3. 154

4. 111

Q.

Common multiples of 4, 5 and 11 are:

1. 220, 440, 660

2. 222, 444, 666

3. 210, 220, 240

4. 200, 210, 220

Q. List all the prime factors of 48.

Q.

Find the product of the following pairs of numbers: [4 MARKS]

1) 3.6 $\times$ 2.1 = ?
2) 4.2 $\times$ 1.4 = ?
3) 2 $\times$ 7.1 = ?
4) 2.3 $\times$ 3.22 = ?

Q.

Find first three common multiples of :
a) $6$ and $8$
b) $12$ and $18$

Q. Which of the following is a common multiple of 5, 6 and 7?

1. 230
2. 210
3. 140
4. 310

Q.

Common multiples of 4, 5 and 11 are _________.

1. 200, 210 and 220

2. 220, 221 and 222

3. 210, 220 and 240

4. 220, 440 and 660

Q. Find the 1st common multiple of $6$ and $8$.

1. $24$
2. $16$
3. $12$
4. $2$

Q. Sara goes to dance class once every 6 days, to karate class once every 12 days and to art class once every 18 days. If she attended all the three classes on 1st April then, on which nearest date will she attend all the three classes again?

1. 4th May
2. 5th May
3. 6th May
4. 7th May

Q. Find the LCM of 12 and 8.

1. 12
2. 24
3. 36
4. 48

Q. Using the common multiple method, find the $L.C.M.$ of the following:

$3,6,9$ and $12$

Q. Does any pair of random numbers have a common multiple?

Q. How to do 6+3
_
4
​​​​

Q. Find the common multiples of 3 and 4 from the following.

1. 12
2. 8
3. 16
4. 24

Q. tell a table in which 72, 80, 95, 81 and 75 come

Q.

Which of the following is a multiple of both 12 and 6?

1. 52

2. 71

3. 48

4. 16

Q.

Common multiples of 4, 5 and 11 are _________.

1. 220, 440 and 660

2. 220, 221 and 222

3. 210, 220 and 240

4. 200, 210 and 220

Q. 12 is a common multiple of 2, 3 and 6.

1. False
2. True

Q. Find the common multiples of 2 and 5 from the following.

1. 10
2. 18
3. 20
4. 27

Q. Find first four common multiples of $1,2$ and $3$.

1. $2,4,8,10$
2. $3,6,12,30$
3. $6,12,18,24$
4. $1,2,3,4$

Q. Mala and Bala got $75$ marks and $25$ marks respectively in an examination. The ratio of the marks scored by Mala to the total marks obtained by both of them is

1. $3:4$
2. $3:1$
3. $1:3$
4. $4:3$