What is 21 mod 26?

Often represented by the operator "mod", the modulo is a mathematical operation that gives the remainder of an integer division.

The result of 21 mod 26 is 21.

How to compute 21 mod 26?

The simplest approach is to use the "mod" operator (often denoted as "%" in many programming languages), but you could do it manually in the following way:

Remainder = N − ( M × ⌊ N M ⌋ )

(where N is the dividend, M is the divisor and ⌊ N M ⌋ represents the integer part of the quotient)

  1. 21 / 26 = 0.80769230769231
  2. ⌊0.80769230769231⌋ = 0 (We only keep the integer part)
  3. 26 × 0 = 0
  4. 21 - 0 = 21 (Subtracting gives us the remainder)

In short: 21 − (26 × ⌊21 / 26⌋) = 21

Is 21 divisible by 26?

A number is said to be divisible by another number, if the remainder of the division is zero.

Given that the result of 21 mod 26 is 21, this indicates that dividing 21 by 26 leaves a remainder of 21. Therefore, no, since the remainder isn't zero, 21 is not divisible by 26.