Age 11 to 14 Challenge Level:
$5\frac13 = 4+ 1\frac13 = 4+ \frac43$
What happens when you subtract 4?
What happens when you divide by 4?
If I want to divide a number by 5, and I want the answer to be the same as when I subtract 5, what can you say about my number?
It's going to be around 6...