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Whole Numbers Only

Can you work out how many of each kind of pencil this student bought?

Squaring the Circle

Bluey-green, white and transparent squares with a few odd bits of shapes around the perimeter. But, how many squares are there of each type in the complete circle? Study the picture and make an estimate.

Interstellar

What number could replace * so that */5 is between 3 and 4?

All in a Jumble

Age 11 to 14
Challenge Level

Chelsea from the Thomas Deacon Academy suggested a strategy for tackling this problem:

To solve All in a Jumble you must first solve the common sense solutions which you already know of.
This may take some of the jumbled questions off your list.

Secondly you cross off the answers you definitely know are incorrect.

You may have about 5-6 questions left. If you do not know these then you could take a guess.
At least you know you have got most of the questions right by common sense!
The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice.
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