What is 9 mod 8?

How to compute 9 mod 8?

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:

$\mathrm{Remainder}=N-(M\times \lfloor \frac{N}{M}\rfloor )$

(where N is the dividend, M is the divisor and $\lfloor \frac{N}{M}\rfloor$ represents the integer part of the quotient)

1. 9 / 8 = 1.125
2. ⌊1.125⌋ = 1 (We only keep the integer part)
3. 8 × 1 = 8
4. 9 - 8 = 1 (Subtracting gives us the remainder)

In short: 9 − (8 × ⌊9 / 8⌋) = 1

Is 9 divisible by 8?

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

Given that the result of 9 mod 8 is 1, this indicates that dividing 9 by 8 leaves a remainder of 1. Therefore, no, since the remainder isn't zero, 9 is not divisible by 8.