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Problems

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Difficulty
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1602
LCM of two integers
Very easy
1616
Prime number?
Very easy
1620
Monk of Charles the Great
Easy
1629
Fermat's Christmas Theorem
Very easy
1636
Big Number
Very hard
1642
Hometask
Easy
1655
The Least Common Multiple
Very easy
1681
Sum of digits
Easy
1687
Digits
Easy
1701
Square Counting
Hard
1702
A Greener World
1709
Continuous Drawing
1710
Counting Quadrilaterals
Easy
1782
The sum of divisors
Easy
1844
Equation
Very easy
1849
Equation 2
Very easy
1904
Maximum degree of a prime
Hard
1905
Minimum degree of prime
Medium
1906
Anniversary
Hard
1932
Greatest Greatest Common Divisor
Very easy
1964
What is left?
Medium
1972
Splitting
Medium
1985
Primes Anna
Medium
2018
Minimal d-exponent
Medium
2186
Divisors
Easy
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