Lowest Common Multiple

Q.

LCM and HCF of two numbers is 12 and 2 respectively. If one of the numbers is 6 then the other number is ____

1. 6

2. 12

3. 4

4. 14

Q.

L.C.M of 12 and 90 is _____.

1. 90

2. 360

3. 180

4. 150

Q.

We have three numbers 2, 4, 7. The LCM of these three numbers is 28.

1. 28
2. 14

Q. What is the smallest number which when divided by 20, 25, 35, 40 leaves a remainder of 14, 19, 29 and 34 respectively?

1. 1394
2. 1404
3. 1606
4. 1406

Q.

Samaira writes 6 pages in one hour, Kate writes 12 pages in one hour whereas Maggie writes 8 pages in one hour. They all have to write an equal number of pages. The least number of pages that they can write equally is ___

1. 43

2. 22

3. 65

4. 24

Q.

Samaira heard 3 bells toll together at 10:00 AM. The first bell tolls after 5 second, the second tolls after 9 seconds and the third tolls after 10 seconds. When will they toll together again?

1. After 2 minutes and 30 seconds
2. After 45 seconds
3. After 3 minutes
4. After 90 seconds

Q. What is the smallest number which when decreased by 7 is exactly divisible by 12, 16, 18, 21 and 28?

1. 1012
2. 1022
3. 1008
4. 1015

Q.

Find the LCM of the numbers 6, 9 and 30.

1. 40
2. 20
3. 80
4. 10

Q.

Find the least number which when divided by 32, 64 & 128 leaves the remainder of 8.

1. 1024

2. 1034

3. 136

4. 128

Q.

LCM of two prime numbers is ________________.

1. sum of two numbers

2. product of both numbers

3. difference of both the numbers

4. division of both the numbers