Vidaara.orgClass 4 · Mathematics
CodeVID-M4-WS
Factors & Multiples — Practice Worksheet
Name: ____________________
Roll No.: __________
Date: ____________
General Instructions
- All questions are compulsory.
- Choose the correct option (A, B, C or D) for each question.
- The answer key is at the end — try the paper first!
Section A — Multiple Choice (1 mark each)
15 × 1 = 15 marks
1.
The smallest common multiple of 3 and 5 is…
- A.8
- B.15
- C.30
- D.10
2.
The first four multiples of 3 are…
- A.3, 6, 9, 12
- B.1, 3, 6, 9
- C.3, 13, 23, 33
- D.3, 5, 7, 9
3.
Which of these numbers is composite?
- A.17
- B.19
- C.21
- D.23
4.
Which of these is a factor of 15?
- A.2
- B.5
- C.4
- D.7
5.
Which number is COMPOSITE?
- A.7
- B.13
- C.9
- D.5
6.
Which list has only PRIME numbers?
- A.2, 3, 5, 7
- B.2, 4, 6, 8
- C.1, 3, 5, 9
- D.3, 5, 9, 11
7.
Which number is a factor of BOTH 6 and 9?
- A.2
- B.3
- C.6
- D.9
8.
Which is a common multiple of 3, 4 and 6?
- A.12
- B.9
- C.8
- D.10
9.
The smallest common multiple of 2 and 7 is…
- A.9
- B.14
- C.21
- D.7
10.
The smallest common multiple of 6 and 8 is…
- A.24
- B.48
- C.12
- D.16
11.
The factors of 8 are…
- A.1, 2, 4, 8
- B.1, 8
- C.2, 4
- D.1, 2, 3, 8
12.
How many factors does a prime number have?
- A.1
- B.2
- C.3
- D.many
13.
The only even prime number is…
- A.2
- B.4
- C.6
- D.0
14.
1 is a factor of…
- A.only even numbers
- B.every number
- C.only 1
- D.no number
15.
Which is a common multiple of 2 and 5?
- A.10
- B.12
- C.15
- D.8
Section B — Challenge / Olympiad (2 marks each)
5 × 2 = 10 marks
16.
Which number is both prime and a multiple of 5?
- A.5
- B.10
- C.15
- D.25
17.
I am less than 30, a multiple of 4, and also a multiple of 6. I am…
- A.12
- B.16
- C.18
- D.20
18.
Which number has exactly 3 factors?
- A.6
- B.8
- C.9
- D.10
19.
Lights flash every 3 s and 5 s. After how many seconds do they flash together?
- A.8
- B.15
- C.30
- D.10
20.
The sum of the first three prime numbers is…
- A.9
- B.10
- C.11
- D.6
Answer Key
Section A — Multiple Choice (1 mark each)
- (B) 15
- (A) 3, 6, 9, 12
- (C) 21
- (B) 5
- (C) 9
- (A) 2, 3, 5, 7
- (B) 3
- (A) 12
- (B) 14
- (A) 24
- (A) 1, 2, 4, 8
- (B) 2
- (A) 2
- (B) every number
- (A) 10
Section B — Challenge / Olympiad (2 marks each)
- (A) 5
- (A) 12
- (C) 9
- (B) 15
- (B) 10
Generated by Vidaara.org · Assignment VID-M4-WS · vidaara.org