Well done to Charlie and Nicholas who answered the last maths challenge correctly with an answer of 27 triangles!

Here is your next maths challenge:

Where should you put plus signs between the digits below to make a total of 99?

9 8 7 6 5 4 3 2 1

For example, you could try:

9 + 8 + 76 + 6 + 5 + 4 + 3 + 21 = 126 (too high!)

9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 = 45 (too low!)

There are two solutions to this problem but they are not easy to find so you may need to try a few different ways!

Have a go at this problem yourself and post your answer as a comment below.

Well done to Chloe Briers, Andie and Jaden who all worked out the correct answer of ’35’ last week – 5HPs to each of you!

Below is this week’s challenge. Remember to comment with your answer and come back to check if you are right.

How many triangles can you count in the picture below:

 

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!