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### Primary 5 Problem Sums/Word Problems - Try FREE

- Whole Numbers And Fractions: Time for a little challenge! > Whole Numbers & Fractions Exercise 11 > 5
- Attempting as Guest
- Attempt Mode: Attempt Single Question

**Score :**

(Single Attempt)

**Question
**

Johnson had 10 stacks of 20-cent coins. There were 5 coins in each stack.

He went to a shop, bought a candy for $2 and received the change in 5-cent coins.

He then used all the 5-cent coins to form a hollow square which had an equal number of coins along each side.

How many coins are there along 2 sides of the square?

(Note: He paid for the candy by giving all the coins he had to the cashier and the cashier returned him his change in 5-cent coins)

The correct answer is :

**81**