Puzzle 1
In my money box, I found $36.80 made up of equal numbers of quarters, dimes, and nickels.
How many of each coin did I find?
Puzzle Copyright © Kevin Stone
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Hint
Remember that a quarter is 25c, a dime is 10c and a nickel is 5c.
Answer
92 of each coin.
Reasoning
There are an equal number of quarters, dimes and nickels, so we know that the answer must be a multiple of:
25c + 10c + 5c = 40c
and:
3680c ÷ 40c = 92 coins.
Puzzle 2
What number replaces the question mark?
Puzzle Copyright © Kevin Stone
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Hint
In the first box, look at 7 & 3, and 4 & 1, to see how we can use them to make 12.
Answer
4.
Reasoning
For each row, the left minus the right gives a number.
The numbers for the rows are then multiplied together.
In the first box:
7 − 3 = 4
4 − 1 = 3
so 4 x 3 = 12
In the second box:
9 − 2 = 7
8 − 3 = 5
so 7 x 5 = 35
In the last box:
6 − 2 = 4
8 − 7 = 1
so 4 x 1 = 4.
Puzzle 3
This famous river has a number of cities along its course.
What is its name?
Puzzle Copyright © Lloyd King
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Hint
The answer is right in front of you.
Answer
Mississippi.
The diagram is actually the word 'mississippi' on its side.
Puzzle 4
Why are 2024 UK pound coins worth more than 2023 UK pound coins?
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Answer
Because there is 1 more coin!
2,024 = 2,023 + 1.