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Problems

Number theory
Difficulty
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7315
Additive Class
Very hard
7317
Divisor Count
Hard
7408
New Year's Toys
Easy
7435
Money and Hiding Places
Hard
7439
Combination
Medium
7462
Superprime numbers.
Medium
7667
Lavrushka and Array Splitting
Easy
7673
Of three prime numbers
Medium
7711
Divisions
Hard
7716
Upside down primes
Easy
7811
Fibonacci Prime Numbers
Very hard
8245
Short cube
Hard
8362
Multiples
Very easy
8549
Distinct Primes
Very easy
8567
The game "Divisibility"
Medium
8593
Divisible by 8
Medium
8664
Сharity work
Medium
8930
Prime Factors
Easy
9028
Number of divisors
Easy
9395
Number of Divisors (Function)
Very easy
9397
"Short Cube"
Hard
9398
Smallest Divisor (Function)
Very easy
9533
Starting number in the sequence
Easy
9547
Factorial (function)
Medium
9606
Modular division
Easy
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