HCF & LCM · Basic Numeracy · UPSC Civil Service

How many consecutive zeros are there at the end of the integer obtained in the product $1^2 \times 2^4 \times 3^6 \times 4^8 \times \ldots \times 25^{...

421 and 427, when divided by the same number, leave the same remainder 1. How many numbers can be used as the divisor in order to get the same remaind...

A can X contains 399 litres of petrol and a can Y contains 532 litres of diesel. They are to be bottled in bottles of equal size so that whole of petr...

For any choices of values of X, Y and Z, the 6-digit number of the form XYZXYZ is divisible by:

How many natural numbers are there which give a remainder of 31 when 1186 is divided by these natural numbers?

There are three traffic signals. Each signal changes colour from green to red and then from red to green. The first signal takes 25 seconds, the secon...

A person X wants to distribute some pens among six children A, B, C, D, E, and F. Suppose A gets twice the number of pens received by B, three times t...

What is the smallest number greater than 1000 that when divided by any one of the numbers 6, 9, 12, 15, 18 leaves a remainder of 3?

Joseph visits the club on every 5th day, Harsh visits on every 24th day, while Sumit visits on every 9th day. If all three of them met at the clu...