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Mathematical Puzzles 



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Puzzle 1 



In the following sum, the digits 0 to 9 have all been used, and the top row's digits add to 9.

Knowing that O = Odd, and E = Even (zero is even), can you determine each digit?

EEO + EOO = OEOE

Puzzle Copyright © Kevin Stone

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Puzzle 2 



My current age is the age of my favourite book (which is 14 years old) plus one third of my age.

How old will I be when my favourite book is twice its current age?

Puzzle Copyright © Kevin Stone

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Puzzle 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 that can be made?

Note: this puzzle is not interactive, and the squares cannot be clicked.

Puzzle Copyright © Kevin Stone

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Puzzle 4 



Yesterday I went for a short bicycle ride around the local lakes. As the weather was very hot, I rode in shorter stages than I'd normally ride.

In Stage One, I rode half of the overall distance.

Stage Two saw half of the remaining distance plus 35 metres covered.

Stage Three covered three-quarters of the remaining distance.

Stage Four completed half of the remaining distance, plus 75 metres.

Stage Five completed the journey with a final burst of 150 metres.

How far did I cycle in total?

Puzzle Copyright © Kevin Stone

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