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Sunday Afternoon Maths LXVIIColoured weights
Not Roman numerals
Advent calendar 2018
Sunday Afternoon Maths LXVICryptic crossnumber #2
Sunday Afternoon Maths LXVCryptic crossnumber #1
Square and cube endings
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Not Roman numerals
The letters \(I\), \(V\) and \(X\) each represent a different digit from 1 to 9. If$$VI\times X=VVV,$$
what are \(I\), \(V\) and \(X\)?
If A, B, C, D and E are all unique digits, what values would work with the following equation?$$ABCCDE\times 4 = EDCCBA$$
How many zeros does 1000! (ie 1000 × 999 × 998 × ... × 1) end with?
In March, I posted the puzzle One Hundred Factorial, which asked how many zeros 100! ends with.
What is the smallest number, n, such that n! ends with 50 zeros?