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Mathematical Puzzles


Difficulty: EasyPuzzle 1

Puzzle IconAt midnight at the start of Monday, January 1st, Professor Stone set two of his old fashioned clocks to the correct time.

One of his clocks gains one minute every hour and the other loses two minutes every hour.

1. When will the clocks next show the same time as each other?
2. When will the clocks both show the correct time?

[Ref: ZDJB] © Kevin Stone

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Difficulty: EasyPuzzle 2

Puzzle IconAlex and Blake were rowing their canoe along the River Trent.

In the morning they managed to row upstream at an average speed of 2 miles per hour.

They then stopped for a spot of lunch and a nice rest.

In the afternoon, the pace was a little easier as they were now rowing downstream back to their starting point, and managed an average speed of 4 miles an hour.

The morning trip took them 3 hours longer than the afternoon.

How far did they row upstream?

[Ref: ZOTY] © Kevin Stone

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Difficulty: EasyPuzzle 3

Starting in the bottom left corner and moving either up or right, adding up the numbers along the way, what is the largest sum which can be made?

Puzzle Image

[Ref: ZWSC] © Kevin Stone

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Difficulty: EasyPuzzle 4

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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