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Mathematical Puzzles


Difficulty: EasyPuzzle 49

Complete this grid with the digits 1 to 6 to make the sum correct.

Perform each mathematical operation in the order shown, from left to right, e.g. 1 + 2 x 3 is treated as (1 + 2) x 3 = 9.

Note: there is no ÷ 1, and at no point is a decimal or fraction used.

Puzzle Grid

[Ref: ZXLN] © Kevin Stone

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Difficulty: EasyPuzzle 50

Puzzle IconWithin the BrainBashers school, the science department has three disciplines.

In total, 280 students study chemistry, 254 students study physics and 280 students study biology.

97 students study both chemistry and physics, 138 students study both physics and biology, 152 students study both chemistry and biology.

73 students study all three disciplines.

Can you determine how many students there are in the science department? The answer is well below 814.

[Ref: ZZYU] © Kevin Stone

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Difficulty: MediumPuzzle 51

What value of * makes the following correct:

Puzzle Image

[Ref: ZWPF] © Kevin Stone

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Difficulty: EasyPuzzle 52

Starting in the bottom left corner and moving either up or right, one square at a time, adding up the numbers along the way, what is the largest sum which can be made once you have reached the top right corner?

Puzzle Image

[Ref: ZNGR] © Kevin Stone

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