What is 9 mod 10?

How to compute 9 mod 10?

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 / 10 = 0.9
2. ⌊0.9⌋ = 0 (We only keep the integer part)
3. 10 × 0 = 0
4. 9 - 0 = 9 (Subtracting gives us the remainder)

In short: 9 − (10 × ⌊9 / 10⌋) = 9

Is 9 divisible by 10?

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 10 is 9, this indicates that dividing 9 by 10 leaves a remainder of 9. Therefore, no, since the remainder isn't zero, 9 is not divisible by 10.