## Australian coins brainteaser

By David Shaw, 15 February 2023

**Difficulty: Fun**

Jane has some Australian silver coins in her pocket. When buying an apple, she realises she has more than $1 in silver coins, but can’t make exactly $1 with her coins. How is this possible? (Silver Australian coins come in 5c, 10c, 20c, and 50c.)

**Scroll down or click for a hint, or the answer!**

## Brainteaser hint

Why don’t you find some Australian silver coins and try it out!

## Brainteaser answer

Jane could have a 50c coin and three 20c coins – she can make 90c or $1.10, but she can’t make $1.

In fact, Jane could have up to $1.35 (one 50c, four 20c, and one 5c) without being able to make exactly $1.

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