Question

1. Find the common factors of
(a) 25 and 80 (b) 42 and 70 (c) 48 and 90
(d) 33 and 66.
2. Find the common factors of
(a 9, 8 and 11 (b) 24, 16 and 32
(c) 8, 20 and 12 (d) 6, 16 and 26
3. Find first three common multiples of
(a) 5 and 15 (b) 8 and 12 (c) 6 and 18.
4. Write all the numbers less than 100 which are
common multiples of 3 and 5.
5. Which of the following are co-prime :
(a) 18 and 35 (b) 15 and 37 (c) 40 and 46
(d) 6 and 48 (e) 20 and 50 () 82 and 32.
6. A number is divisible by 18. By what other number
it is divisible?
7. A number is divisible both by 4 and 7. By what
other number will it be always divisible?​

Answer 1

Answer:

i get the answer of 7th one

it is 28 and the other number is 2

Step-by-step explanation:

as 28 is divisible by 7,4 and therefore it is also divisible by 2

Answer 2

Co-prime number is a set of numbers or integers which have only 1 as their common factor i.e. their highest common factor (HCF) will be 1.

Co-prime numbers are also known as relatively prime or mutually prime numbers.