Select the number triad that is analogous to the given triads.
 (64, 8, 65), (125, 27, 89)

Direction : What value should come in place question mark(?) in the following questions?

4 × 5² – 3² × 7 + 6²=?+24

If the sum of a number and its reciprocal be 2, then the number is-

What will be come in place of question mark(?) in the following number series?
13 , 14 , 30 , 93, ?, 1885

The largest natural number which exactly divides the product of any four consecutive natural numbers is

Which of the following is the largest fraction   $${6\over7},{5\over6},{7\over8},{4\over5} ?$$ 

The mean of 20 items is 55. If two items 45 and 30 are removed, what will be the new mean of the remaining items?

Twice the difference between two numbers is equal to their sum. If one number is 15, find the other number.