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Puzzle a Day's title: Puzzle a Day | A new puzzle, riddle, game or interesting tidbit posted every day
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1. The number 105263157894736842 is fascinating. This is because it’s the smallest positive integer with a remarkable property that occurs when you move its final digit to the front: 210526315789473684.
How is the new number related to the original?
2. What number comes next in this sequence?
101, 112, 131, 415, 161, 718, ?
...You have two colours of paint available: red and blue. Each of a cube’s six faces must be painted exactly one colour.
How many distinct colourings of the cube are possible?
Keep in mind:
Two colourings are considered the same if one can be rotated to match the other. You may use just one colour, so an entirely red cube and an entirely blue ...Today’s puzzle appeared on series 22 of the BBC quiz show Only Connect. What connects the four clues above?
Scroll down for a clue and further down for the answer.
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Clue: Think opposites.
Scroll down for the answer.
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...During a 24-hour day (from midnight to the following midnight) how many times do the hour and minute hands of a standard analogue clock form an exact 90 degree angle?
Scroll down for a clue and further down for the answer.
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Clue: Consider how many compl...
A casino offers you the following game.
A fair coin is tossed repeatedly. The game ends as soon as the coin lands on heads. Your potential prize starts at $2 and doubles after every tail.
So:
If you get heads on the first toss, you win $2. If you get tails followed by heads, you win $4. If you get two tails followed by heads,...