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Mathematical Puzzles


Difficulty: EasyPuzzle 1

Puzzle IconIn the local wood there are a number of trees. On these trees there are a number of birds.

The local game keeper knows that there are as many birds on each tree as there are trees in the wood.

He also knows that there are between 2000 and 2100 birds in total. How many trees are there in the wood?

[Ref: ZSQB] © Kevin Stone

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Direct Link: www.brainbashers.com?ZSQB


Difficulty: EasyPuzzle 2

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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Direct Link: www.brainbashers.com?ZDJB


Difficulty: EasyPuzzle 3

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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Direct Link: www.brainbashers.com?ZOTY


Difficulty: EasyPuzzle 4

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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Direct Link: www.brainbashers.com?ZWSC

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