Guess my number!

In Year 5, we have been playing a great Maths game called "Guess my number". It has really improved our understanding of number properties and it's good fun too! Here's how to play the game:

1. One person chooses a number
2. Another person asks a question with a yes or no answer, related to the properties of numbers
3. The first person answers yes or no
4. The other player(s) use the answer to think of another question.

We have been making this really challenging for ourselves by choosing numbers with decimals and asking questions such as "Is it a triangle number?"

Try playing the game at home!
Tip: think carefully about which questions you need to ask first to get to the answer as quickly as possible. We like to start with "Is the number an integer?", and if so, next we ask whether it is odd/whether it is even, and whether it is greater than/less than a certain number. Try to rule out as many numbers as possible in one go!

Here are some more questions you could use:
- is it a square number?
- is it a prime number?
- is the tens digit greater than the units digit?

Let us know how you get on!