IOQM · Mathematics · Basic Preliminaries
Naturals, integers, rationals, irrationals, reals — properties and basic identities.
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Q1 · Number System · MEDIUM
How many positive integers less than 1000 are divisible by both 6 and 10?
Q2 · Number System · HARD
What is the last digit of 3^(3^3)?
Q3 · Number System · EASY
What is the remainder when 7^100 is divided by 5?
Q4 · Number System · MEDIUM
What is the number of positive divisors of 2⁴ × 3³ × 5²?