Question

If five matchsticks are needed to make a model of 2, then the number of matchsticks needed to make $2n+1$ such models is

• A. $2n+1$
• B. $2(2n+1)$
• C. $5(2n+1)$
• D. $2(5n+1)$

Answer 1

The correct option is C

$5(2n+1)$

A $2$ made using matchsticks is shown below.

We would always require $5$ matchsticks to make $2$.

So, to make '$2n+1$' models of $2$’s we need '$5(2n+1)$' matchsticks.