Question

A number n when divided by 21 gives remainder 5 find the remainder when it is divided by 7

Answer 1

Answer:

When n is divided by 7 gives remainder 1.

Step-by-step explanation:

Given a number n when divided by 21 gives remainder 5.

∴ $\frac{n}{21}=x+5$

we have to find the remainder when n is divided by 7

∵ $\frac{n}{21}=x+5$

⇒ $\frac{n}{7\times 3}=x+5$

⇒ $\frac{n}{7}=3(x+5)$

⇒ $\frac{n}{7}=3x+15=(3x+14)+1$

which implies when n is divided by 7 gives remainder 1.

Answer 2

Hello buddy

Answer:

Answer is 1

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I hope it helped you dude