Number Theory
Using Chinese Remainder Theorem
A bag has certain number of pens. If you take out 3 pens at a time, 2 pens are left, if you…
Category: Number Theory
Number Theory
Least Common Multiple
In this post we explain the basics of Least Common Multiple(LCM). We will understand the techniques on how to find the LCM…
Number Theory
Highest Common Factor
In this post we explain the basics of Highest Common Factor (HCF) also known as the Greatest Common Divisor(GCD) or the Greatest…
Number Theory
Highest Power of a Number in a Factorial
In this post, we will have a look at the tips and techniques to calculate the Highest Power of a Number in…
Number Theory
Divisors of a Number – Sum and Product of Divisors
Before you check this post, can you answer the number of divisors of 1728. In this post, we have explained a simple…
Number Theory
How to Calculate Remainders of large numbers
In this post we will see how to calculate remainders like the remainder of a sum, remainder of a product and understand…
Number Theory
Last Two Digits of Large Number
Here, we will see how to find the last two digits of a large number. In the previous post we tried to…
Number Theory
Units digit of a number raised to power
Here, we will see how to find the units digit of a number that is in the form ${x^y}$. We will first…