The arithmetic mean of the nine numbers 9,99,999,9999,…..99999(9times) is a number M. What is the remainder when MM is divided by 13?

How many of the following rectangle cannot be divided in two equal parts which can be rearranged to form a square? 16×9 18×8 24×6 36×4

A shipping clerk has five boxes of different but unknown weights. The clerk weighs the boxes in pairs. The weights obtained are 101, 102, 103, 104, 10...

How many pairs of natural numbers exist such that their greatest common divisor is 45 and product is 21600?

How many four digit positive integer divisible by 7 have property that, when the first and last digit is interchanged, the result is a (not necessaril...

Pipe A and pipe B can alone fill the tank respectively in 18 hours and 24 hours. A third pipe C empty the tank in 36 hours. If pipe A open at 8:00 am,...

12 men or 18 women can dig a cylindrical well of radius 2.4 meters and height 6 meters in 9 hours. In how many hours 6 men and 11 women can dig a cyli...

How many natural numbers from 1 to 2011 has a sum of digits which is multiple of 5?

A and B when divided by 56 leave remainders of 48 and 32 respectively. When divided by 44, both leave a remainder of 24. If the sum of A and B is divi...