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Problems

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Difficulty
Sort by
7503
Olympiad
Very easy
7505
Sequence of multiples
Medium
7533
Restaurant Ratings
Hard
7544
The Magical 3
Very easy
7612
Alex Origami Squares
Very easy
7624
Alter Board
Hard
7671
Preparation for the Chess Olympiad
Easy
7672
Divisible by 3
Easy
7673
Of three prime numbers
Medium
7674
Ancient Task
Easy
7677
Fives
Medium
7684
Ardenia
Hard
7695
Algebraic Teamwork
Medium
7725
Bricks
Easy
7798
Artem vs. Mansur
Easy
7802
John's Test
Very hard
7803
Coins on the Board
Hard
7807
Happy sum
Easy
7813
Cat, dog and hare
Very easy
7815
Generous Vasya
Very easy
7816
Two trains
Easy
7817
Good number
Very easy
7822
MISSING NUMBER
Very easy
7835
Seven primes
Medium
7839
Sum in sympathetic table
Easy
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