Puzzle 17
What number comes next in this sequence:
3 · 24 · 102 · 312 · 777 · ?
Puzzle Copyright © Kevin Stone
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Answer
1680.
This is n to the power of 5, starting with 2^5 = 32, with the last digit missing, 7^5 = 16807.
Puzzle 18
What is the next number in this sequence:
1 · 2 · 3 · 4 · ?
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Hint
A very, very easy puzzle?
Puzzle 19
You've been asked to buy the cakes for the school party and you've been given $100 to buy 100 cakes.
Donuts cost 56c, chocolate eclairs cost $2.26 and iced rolls cost 92c.
How can you spend exactly all of the money on the 100 cakes?
Puzzle Copyright © Kevin Stone
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Answer
15 donuts, 10 chocolate eclairs and 75 iced rolls.
15 + 10 + 75 = 100 and 15 x 0.56 + 10 x 2.26 + 75 x 0.92 = 100.00.
Puzzle 20
What belongs to you but other people use it more than you?
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