Primary 5 Problem Sums/Word Problems - Try FREE

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(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