You may also like

problem icon

I'm Eight

Find a great variety of ways of asking questions which make 8.

problem icon

Noah

Noah saw 12 legs walk by into the Ark. How many creatures did he see?

problem icon

Magic Plant

On Friday the magic plant was only 2 centimetres tall. Every day it doubled its height. How tall was it on Monday?

Birthday Cakes

Stage: 1 Challenge Level: Challenge Level:2 Challenge Level:2

You had to be quite careful with this problem - Alice explained how she went about solving it:

First I got 24 lollipop sticks then I fiddled around and sorted out Jack's birthdays and put in Kate's birthdays where they fitted. I had 3 tries to get it right.

Alice sent in this very clear picture of the answer:

lolly sticks in rows - top ro w for Jack, bottom row for Kate. In Jack's row: 1, 2, 3, 4, 5, and 6 lolly sti cks. In Kate's row: 1 underneath Jack's 4, 2 underneath Jack's 5.

Amy and Nathan from Maadi British International School in Cairo also explained their reasoning:

We worked out it couldn`t be Jack's 7th birthday because that was too big. It couldn't be 5 because 5 was too small so it had to be 6 because it was in between the 5 and the 7. We had three more candles left so Kate had to be 2 years old. Kate was 1 when Jack was 4, so when Kate was 0, Kate was born and Jack had to be 3 years old.

Thank you to all of you for your very clear solutions.