Find the remainder when 83²⁶¹ is divided by 17.

The unit digit in the sum of (124 )³⁷² + (124 )³⁷³ is: 

A number whose one - fifth part increased by 4 is equal to its one - fourth part diminished by 10 is: 

What is the quotient , when 2645 is divided by 48 ? 

The numbers 1, 3, 5, 7______99 and 128 are multiplied together. The number of zeros at the end of the product must be: 

The number which can be written in the form of n (n+1) (n+2), where n is a natural number, is: 

While solving a problem, by mistake, Anita squared a number and then subtracted 25 from it rather than first subtracting 25 from the number and then squaring it. But she got the right answer. What was the given number? 

What is the sum of all natural numbers between 100 and 400 which are divisible by 13?