If the product of three consecutive numbers is 210 then sum of the smaller number is: 

The L.C.M and H.C.F of the two numbers are 84 and 21 respectively. If the numbers have a ratio of 1: 4, what is the larger number?

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 of three numbers 98, 175 and 210 will be:

The smallest five digit number which is divisible by 12, 18 and 21 is:

The greatest four digit number which is exactly divisible by each one of the numbers 12, 18, 21 and 28.

There are some boys and girls in a room. The square of the number of girls is 28 less than the square of the number of boys. If two more girls join then the number of boys and girls becomes equal, then what is the total number of boys and girls in the room?

LCM of two numbers is 2079 and their HCF is 27. If one of the numbers is 189, the other number is