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Problems

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Difficulty
Sort by
576
Office
Very easy
577
Book
Very easy
582
Sequence-2
Easy
583
Airplane
Hard
596
Trade Agreements in Amber
614
Buying fruits
Medium
616
Radars
Very easy
617
Lotto
Easy
624
DVD
Hard
627
Unloved digits
Easy
630
Anti-prime Sequences
631
Mondriaan's Dream
Very easy
637
Bones for Sharik
Very easy
638
Indivisibility of binomial coefficients
Easy
641
Number of quadratic residues
Easy
643
Triangular Room
Easy
646
Jumps on strip
Hard
649
Factorial and fourth degree
Hard
672
Quadroquadratures
Medium
697
Box
704
Factorials
Very easy
707
Puddles
Hard
717
The Blue Caterpillar Gives Advice
Easy
724
Who stole the pretzels?
Medium
726
Again A + B
Easy
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