What's My Weight?

There are four equal weights on one side of the scale and an apple on the other side. What can you say that is true about the apple and the weights from the picture?

Back to School

Mr. Sunshine tells the children they will have 2 hours of homework. After several calculations, Harry says he hasn't got time to do this homework. Can you see where his reasoning is wrong?

The Magic Number and the Hepta-tree

Find the exact difference between the largest ball and the smallest ball on the Hepta Tree and then use this to work out the MAGIC NUMBER!

Shedding Some Light

Stage: 2 Challenge Level:

Gurjeet from Cranford Community College says:

There are 6 straight lines and 5 lights on each 6*5= 30 so there are 30

Eleanor sent in her solution to the rest of the problem:

I guessed that there were about 25 lights in the picture. When I counted them there were 28, but I think there are some that you can't see behind the metal bits. My guess was quite a good one because it was only 3 away from the real number that you can see in the picture. It looks like there are 6 rods, and if they all have the same number of lights then the total should be 30, so I think there are two more lights that are hidden. The shape in the middle is a pentagon, but one of the rods doesn't fit in with the rest.

Thank you Eleanor and Gurjeet!