Question 1

The LCM of 16, 24, 36, 52 and 54 is?

Accepted Answer

5616

Question 2

What is the LCM (least common multiple) of 57 and 93?

Accepted Answer

1767

Question 3

What is the HCF (highest common factor) of 133 and 112?

Accepted Answer

7

Question 4

What is the LCM of 120 and 450?

Accepted Answer

1800

Question 5

Three friends J, K and L jog around a circular stadium and complete one round in 12, 18 and 20 seconds respectively. In how many minutes will all the three meet again at the starting point.

Accepted Answer

All the three friends will meet at the starting point again after X seconds, such that X is the LCM of the times taken by J, K and L to complete one round. => LCM of 12, 18 and 20 = 180 seconds = 3 minutes. Hence 3 minutes is the answer.

HCF and LCM Questions