Category Archives: 6CSt

Every week we will be updating the blog with a new maths challenge to get your brains thinking – here is this week’s.

Below is a 1-100 number square. Your task is to find a chosen number from the number square.

Here are some clues to help you:

The number is greater than 9

The number is not a multiple of 10

The number is a multiple of 7

The number is odd.

The number is not a multiple of 11

The number is less than 200

Its units digit is larger than its tens digit.

Its tens digit is odd.

So what is the number?

Comment with your solution – if you recieve a comment saying you are correct you can have 5 HPs.

Extension: Although all 8 clues are true, only 4 are neccessary for finding the answer. Which four clues are neccessary and why? If you can comment with the correct answer you will recieve 10 HPs!