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Advent calendar 2020
23 December
All 2020 advent puzzles
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198 is the smallest number that is equal to 11 times the sum of its digits.
Today's number is the smallest number that is equal to 48 times the sum of its digits.
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We're looking for a number \(n\) such that the digits of \(n\times48\) add up to \(n\). If we try numbers in order, we find that 9 works, so today's number is
432
.
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volume
gerrymandering
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3d shapes
folding tube maps
regular shapes
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even numbers
digital clocks
scales
speed
cards
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division
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probabilty
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coins
perfect numbers
perimeter
floors
decahedra
pascal's triangle
crosswords
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numbers
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