Find the HCF of 306, 204 and 136.

The least number which when divided by 4, 6, 8, 12 and 16 leaves a remainder of 2 in each case is: 

Four bells ring at the intervals of 5, 6, 8 and 9 seconds. All the bells ring simultaneously at some time. They will again ring simultaneously after: 

The smallest perfect square divisible by each of 6, 12 and 18 is : 

Two numbers are in the ratio 3 : 4. Their LCM is 84 . The greater number is: 

Three men step off together from the same spot. Their steps measure 63 cm, 70 cm and 77 cm respectively. The minimum distance each should cover so that all can cover the distance in complete steps is 

The HCF and LCM of two numbers are 44 and 264 respectively. If the first number is divided by 2, the quotient is 44. The other number is:

The sum of two numbers is 84 and their HCF is 12. Total number of such pairs of number is