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Mathematical Puzzles 



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Puzzle 53 



What is the 20th prime number?

2, 3, 5, 7, ...

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Puzzle 54 



A 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?

Puzzle Copyright © Kevin Stone

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Puzzle 55 



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

Hexagons

Puzzle Copyright © Kevin Stone

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Puzzle 56 



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 Copyright © Kevin Stone

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