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Mathematical Puzzles


Difficulty: MediumPuzzle 41

Puzzle IconWhat is...

...the 20th prime number?

[Ref: ZACP]

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Difficulty: MediumPuzzle 42

Puzzle IconA trout's tail weighs eight pounds.

Its head weighs as much as the tail and one-half of the body combined, and the body weighs as much as the head and tail combined.

What does the whole trout weigh?

[Ref: ZKSK] © Kevin Stone

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Difficulty: EasyPuzzle 43

How many hexagon-type shapes, in total, can you find in this puzzle. Clue: there are more than 45.

Hexagons

[Ref: ZEIA] © Kevin Stone

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Difficulty: EasyPuzzle 44

Starting with any number on the top row, make your way to the bottom, adding the numbers as you go.

Each time you go to the next row, you can move straight down, or one place to the left or right.

What is the highest total you can make? What is the lowest?

Puzzle Image

[Ref: ZHIZ] © Kevin Stone

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