Three numbers which are co-prime to each other are such that the product of the first two is 551 and that of the last two a 1073. The sum of the three numbers is :
The H.C.F. and L.C.M of two numbers are 11 and 385 respectively. If one number lies between 75 and 125, then that number is :
H.C.F. of 4 x 27 x 3125, 8 x y x 25 x 7 & 16 x 81 x 5 x 11 x 49 is :
252 can be expressed as a product of primes as ;
The least rubber which is a perfect square and is divisible bv each of the numbers Jo, 20 and 24, is :
The H.C.F. of 2/3. 8/9. 64/81 and 10/27 is :
The H.C.F. of 1.75, 5.6 and 7 is :
252 can be expressed as a product of primes as :
The H.C.F. of two numbers is 11 and their L.C.M. is 7700. If one or the numbers is 275, then the other is :
Six bells commence tolling together and toll at intervals of 2, 4, 6, 8, 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together ?
Let N be the greatest number that will divide 1305, 4665 and 6905, leaving the same remainder in each case Then sum of the digits in N is :
A number a is said to be perfect if the sum of all its divisors (excluding n itself) is equal to n. An example of perfect number is :
Four different electronic devices make a beep after every 30 minutes, 1 hour, 1.5 hourand 1 hour 45 minutes respectively. All the devices beeped together at 12 noon. They will again beep together at :
The maximum number of students among them 1001 pens and 910 pencils can be distributed in such a way that each student gets the same number of pens and same number of pencils is :
The H.C.F. of two numbers is 23 and the other two factors of their L.C.M. are 13 and 14. The larger of the two numbers is :