Decimo
your daily dose of mathematical puzzles
3
7
1
9
5
2
8
6
4
0
2
Pulse
Daily
· number-hunt
find the hidden number in a field of distractions.
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2
3
4
5
6
7
8
9
10
11
12
Sievle
Daily
· prime puzzle
sift primes from composites before time runs out.
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Trace
Daily
· packing puzzle
drag paths through digits so every line evaluates to today's number.
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0
1
2
3
4
5
6
7
8
9
Tenku
Daily
· 10-digit puzzle
arrange ten digits to satisfy today's equation.
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1
+
8
×
1
8
+
5
9
×
9
Weave
Weekly
· arithmetic crossword
equations woven across a sparse crossword grid — a new puzzle each Sunday.
play →