Question Paper
Class / Subject: Class 8 (ICSE) · Mathematics
Chapter: Chapter 5 — Chapter 5: Playing with Numbers
Time Allowed: 32 minutes
Max Marks: 16
1. What is a divisibility rule for 3? [1]
(A) Sum of digits divisible by 3
(B) Last digit is 3
(C) First digit is 3
(D) Number of digits is 3
2. How is a two-digit number generalised? [1]
(A) 10a + b
(B) a + b
(C) ab
(D) a - b
3. What does generalisation help us do? [1]
(A) Understand and prove number patterns
(B) Ignore number patterns
(C) Confuse numbers
(D) Nothing useful
4. What happens when you reverse a 2-digit number's digits and subtract? [1]
(A) You get a multiple of 9
(B) You get a multiple of 3 only
(C) You get a random number
(D) Nothing specific happens
5. Is 123 divisible by 3? [1]
(A) Yes, since 1+2+3=6 is divisible by 3
(B) No
(C) Only sometimes
(D) Divisibility rules don't apply
6. What does exploring number patterns build? [1]
(A) Mathematical reasoning
(B) Confusion only
(C) No useful skill
(D) Only memorisation
7. Why generalise numbers using letters? [1]
(A) To prove patterns work for all numbers
(B) To confuse students
(C) No reason
(D) It's only for decoration
8. Why learn divisibility rules? [1]
(A) To quickly check divisibility
(B) No reason
(C) It's not useful
(D) Only for tests
9. What is a divisibility rule for 3? [1]
(A) Sum of digits divisible by 3
(B) Last digit is 3
(C) First digit is 3
(D) Number of digits is 3
10. How is a two-digit number generalised? [1]
(A) 10a + b
(B) a + b
(C) ab
(D) a - b
11. What does generalisation help us do? [1]
(A) Understand and prove number patterns
(B) Ignore number patterns
(C) Confuse numbers
(D) Nothing useful
12. What happens when you reverse a 2-digit number's digits and subtract? [1]
(A) You get a multiple of 9
(B) You get a multiple of 3 only
(C) You get a random number
(D) Nothing specific happens
13. Is 123 divisible by 3? [1]
(A) Yes, since 1+2+3=6 is divisible by 3
(B) No
(C) Only sometimes
(D) Divisibility rules don't apply
14. What does exploring number patterns build? [1]
(A) Mathematical reasoning
(B) Confusion only
(C) No useful skill
(D) Only memorisation
15. Why generalise numbers using letters? [1]
(A) To prove patterns work for all numbers
(B) To confuse students
(C) No reason
(D) It's only for decoration
16. Why learn divisibility rules? [1]
(A) To quickly check divisibility
(B) No reason
(C) It's not useful
(D) Only for tests