Even numbers are formed by taking at least two at a time from the numbers `0, 4, 8, 9`. Their H.C.F. is (a) 2       (b) 4          (c) 10      (d) None of these

If a group of n distinct objects, the number of arrangements of 4 object is 12 times the number of arrangements of 2 objects, then the number of objects is (a) 10 (b) 8 (c) 6 (d) none of these

The L.C.M.of two numbers is 12 xx their H.C.F.The sum of H.C.F. and L.C.M. is 403. If one numbers is 93, find the other.(a) 124 (b) 128 (c) 134 (d) None of these

The number of number-pairs lying between 40 and 100 with their H.C.F. as 15 is (a) 3 (b) 4 (c) 5 (d) 6

The ratio of two numbers is 3:4 and their H.C.F is 4 then their LCM is

The number of four digited even numbers that can be formed from { 4,5,6,7,8,9} is

The number of all five digit numbers which are divisible by 4 that can be formed from the digits 0,1,2,3,4 (without repetition) is a. 36 b. 30 c. 34 d. None of these

The number of all five digit numbers which are divisible by 4 that can be formed from the digits 0,1,2,3,4 (without repetition) is a. 36 b. 30 c. 34 d. None of these

The product of two numbers is 2028 and their H.C.F. is 13. The number of such pairs is (a) 1 (b) 2 (c) 3 (d) 4

A seven digit number is choosen. What the probability that even number occupy even places? 1/8 (b) 1/4 (c) 1/2 (d) None of these

The number of four digited even numbers that can be formed from {4,5,6,7,8,9} is