Math, asked by fashiontrender000, 1 month ago

*Which of the following is a pair of co-prime numbers?*

1️⃣ 63 and 105
2️⃣ 27 and 45
3️⃣ 91 and 55
4️⃣ 32 and 56​

Answers

Answered by shashipratapsingh24
1

Answer:

91 and 55

Step-by-step explanation:

The factor of 91 is 7×13 and

the factor of 55 is 5×11

both the factor is prime number

& the common factor 91 and 55 is 1

and the 1 is co-prime number.

I hope this helps you take care dear

Answered by pulakmath007
3

SOLUTION

TO CHOOSE THE CORRECT OPTION

Which of the following is a pair of co-prime numbers

1. 63 and 105

2. 27 and 45

3. 91 and 55

4. 32 and 56

CONCEPT TO BE IMPLEMENTED

Co-prime numbers :

Two numbers or integers are co-prime if their common factor is only 1

EVALUATION

CHECKING FOR OPTION : 1

63 = 3 × 3 × 7

105 = 3 × 5 × 7

SO common Factor = 21

So not co-prime

CHECKING FOR OPTION : 2

27 = 3 × 3 × 3

45 = 3 × 3 × 5

Also common Factor of 27 and 45 = 9

So not co-prime

CHECKING FOR OPTION : 3

91 = 7 × 13

55 = 5 × 11

Common factor of 91 and 55 = 1

So co-prime

CHECKING FOR OPTION : 4

32 = 2 × 2 × 2 × 2 × 2

56 = 2 × 2 × 2 × 7

Common factor of 32 and 56 is 8

So not co-prime

FINAL ANSWER

Hence correct option is 3. 91 and 55

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