This document contains a series of math problems and their solutions related to factors, multiples, and divisibility. It begins by listing the factors of numbers like 15 and 40. It then provides the first three multiples of numbers like 6 and 8. Several problems ask the reader to identify the factors of pairs of numbers and circle any common factors. Another set of problems asks for the first five multiples of pairs of numbers and to circle common multiples. Finally, it lists numbers divisible by factors like 2, 3, 4, etc. and identifies the common factors of pairs of numbers.

1. FACTORS AND
MULTIPLES
By: Indra Chhetri

2. Question
• List all the possible factors of these
numbers.
i. 15
ii. 40
Ans:
i. {1,3,5,15}
ii. {1,2,4,5,8,10,20,40}

3. Question
Tell and write the first three multiples of
these numbers.
i. 6
ii. 8
Ans:
i. 6,12,18
ii. 8,16,24

4. Question
Tell and write all the possible factors of
these numbers and also circle the
common factors.
i. 12 , 18
ii. 35,40
Ans:
i. {1,2,3,4,6,12} , {1,2,3,6,9,18}, C={1,2,3,6}
ii. {1,5,7,35} ,{1,2,4,5,8,10,20,40} , C={1,5}

5. Question
Tell and write the first five multiples of
these numbers then circle the
common multiples.
i. 2 , 4
ii. 9 , 12
Ans:
i. {2,4,6,8,10} , {4,8,12,16,20} , C={4,8}
ii. {9,18,27,36,45} , {12,24,36,48,60}, C={36}

6. Question
• Make the separate list of the numbers
exactly divisible by 2,3,4,5,6,8,9 and
10.
50 , 75 , 124 , 180 , 248 , 369 , 435 , 504
Ans: 2 = 124, 50 ,180 , 248, 504
3= 75, 180, 369, 435, 504
4= 124, 180, 248, 504
5= 50, 75, 180, 435
6= 180, 504 9= 180 , 369, 504
8= 248, 504 10= 180

7. Questions
Write the first five multiples of each pairs of these
numbers. Then circle the common multiples.
i. 2 and 3
ii. 3 and 6
iii.8 and 10
iv.12 and 15
Ans:
i. {2,4,6,8,10} {3,6,9,12,15} C={6}
ii. {3,6,9,12,15} {6.12.18.24.30} C={6, 12}
iii.{8, 16,24,32,40} {10,20,30,40,50} C={40}
iv.{12,24,36,48,60} {15,30,45,60,75} C={60}

8. Question
• Write all the possible factors of the each pairs
of these numbers. Then circle the common
factors.
i. 6 and 8
ii. 9 and 12
iii.18 and 24
iv.30 and 40
Ans:
i. {1,2,3,6} {1,2,4,8} C= {1,2}
ii. {1,3,9} {1,2,3,4,6,12} C= {1,3}
iii.{1,3,6,18} {1,2,3,4,6,8,12,24} C= {1,3,6}
iv.{1,2,3,5,6,10,15,30}
{1,2,4,5,8,10,20,40} C={1,2,5,10}

9. THANK YOU FOR
WATCHING
By: Indra Chhetri