About Prime Numbers and Factors Quiz #840
Prime Numbers and Factors Quiz #840 was the quiz for Tuesday, October 20, 2026: 10 questions: 4 easy, 3 medium and 3 hard. Everyone who played Prime Numbers and Factors Quiz that day got the same quiz, and it stays here to play for 60 days.
The questions of Prime Numbers and Factors Quiz #840
- Which of these numbers is a prime number?
- What is the next prime number after 19?
- What is the next prime number after 53?
- What is 9 squared?
- What is the greatest common factor of 40 and 56?
- What is the greatest common factor of 20 and 24?
- What is the greatest common factor of 18 and 63?
- How many prime numbers are there between 10 and 30?
- What is the greatest common factor of 64 and 80?
- What is the greatest common factor of 36 and 54?
The answer options and the answers appear only when you play the quiz, one question at a time.
New to Prime Numbers and Factors Quiz? The rules, tips and common questions are on the Prime Numbers and Factors Quiz page.
Other days of Prime Numbers and Factors Quiz
- Prime Numbers and Factors Quiz #843, Oct 23
- Prime Numbers and Factors Quiz #842, Oct 22
- Prime Numbers and Factors Quiz #841, Oct 21
- Prime Numbers and Factors Quiz #839, Oct 19
- Prime Numbers and Factors Quiz #838, Oct 18
- Prime Numbers and Factors Quiz #837, Oct 17
- Today’s quiz, #851
Every day of the last 60 is in the puzzle archive.