Number properties, divisibility and classifications.
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Q1 · Number System · MEDIUM
A number when divided by 7 leaves a remainder of 4. What will be the remainder when the same number is divided by 14?
Q2 · Number System · EASY
The sum of the first 50 natural numbers is:
Q3 · Number System · HARD
A six-digit number 5a372b is divisible by both 8 and 9. What is the value of a + b?
Q4 · Number System · EASY
How many prime numbers are there between 60 and 80?
Q5 · Number System · HARD
What is the sum of all two-digit numbers that leave a remainder of 3 when divided by 7?