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?
14, 8, 7 , 11.5, 22, ?

Find the greatest number which divides 108, 124 and 156, leaving the same remainder. 

Find 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.

A number when divided by 192 gives a remainder of 54. What remainder would be obtained on dividing the same number by 16 ?

The value of (81)3.6 * (9)2.7/ (81)4.2 * (3) is __

Divide 50 into two parts so that the sum of their reciprocals is   $${1\over 12} $$

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