## Is 77 a coprime?

The prime factorization of 77 is 7 × 11. Since it has a total of 2 prime factors, **77 is a composite number**.

## Is 69 a coprime number?

**No, 69 is not a prime number**. The number 69 is divisible by 1, 3, 23, 69. For a number to be classified as a prime number, it should have exactly two factors. Since 69 has more than two factors, i.e. 1, 3, 23, 69, it is not a prime number.

## What are the co prime numbers from 1 to 100?

Co-prime Numbers from 1 to 100

Some of the co-prime number pairs that exist from 1 to 100 are (1, 2), (3, 67), (2, 7), (99, 100), (34, 79), (54, 67), (10, 11), etc. Try out forming more such pairs of co-prime numbers by yourself. Here is Cuemath’s online co-prime calculator for our ease.

## Is 68 and 17 coprime numbers?

factors of 17: 1,17. factors of 68: 1,2,4,17,34,68. since two factor are common between 17 and 68, **they are not co prime numbers**.

## Why is 77 not a prime number?

No, 77 is not a prime number. **The number 77 is divisible by 1, 7, 11, 77**. For a number to be classified as a prime number, it should have exactly two factors. Since 77 has more than two factors, i.e. 1, 7, 11, 77, it is not a prime number.

## What are the factor pairs of 77?

Therefore, the pair factors of 77 are **(1, 77) and (7, 11)**.

## Is 69 a prime or composite?

The number 69 is a **composite number**. Its factors are 1, 3, 23, and 69.

## Is 57 and 69 a co-prime number?

**The numbers 57 and 69 are co-primes** – Mathematics.

## What are the factor of 69?

Solution: The factors of 69 are **1, 3, 23 and 69** .

## How do you find a co-prime number?

To find the co-prime of a number, **find the factors of the number first.** **Then, choose any number and find the factors of the chosen number**. All the numbers which do not have any common factor other than 1 will be the co-prime of the given number.

## What are the co-prime numbers from 1 to 50?

Therefore, the prime numbers between 1 to 50 are **1, 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, and 47**.

## What are the co-prime numbers from 1 to 30?

{17, 47, 107, 137, 167, 197, 227, 257, 317, 347, 467, 557, 587, 617, 647, 677, 797, 827, 857, 887, 947, 977, 1097, 1187, 1217, 1277, 1307, 1367, 1427, 1487, 1607, 1637, …}

## Is 81 and 16 are Coprime?

(f) 81 and 16

Since both have only one common factor, i.e., 1, therefore, **they are co-prime numbers**.

## Which of the following pairs of number are Coprime 17 and 68?

Factors of 68 are 1, 2, 4, 17, 34 and 68 . 1 and 17 are teh common factor. i.e. they are not co-prime. Therefore, no **17 and 68 are not co prime numbers**.

## Which of the following numbers are co-prime 15 and 37?

Coprime numbers are numbers that have only 1 as their HCF. 18 and 35 have no common factors, Therefore, 18 and 35 are coprime numbers. As they have no common factors, **15 and 37** are co-prime numbers.

### References:

- https://metanumbers.com/77
- https://www.cuemath.com/numbers/is-69-a-prime-number/
- https://www.cuemath.com/numbers/coprime-numbers/
- https://www.lidolearning.com/questions/m-bb-ncert6-ch3-ex3p4-q5/q5-which-of-the-following-numb/
- https://www.cuemath.com/numbers/is-77-a-prime-number/
- https://byjus.com/maths/factors-of-77/
- https://study.com/academy/answer/is-69-a-prime-number-or-a-composite-number.html
- https://www.shaalaa.com/question-bank-solutions/the-numbers-57-and-69-are-co-primes-highest-common-factor_194027
- https://byjus.com/maths/factors-of-69/
- https://byjus.com/maths/co-prime-numbers/
- https://www.vedantu.com/question-answer/are-the-prime-numbers-between-1-to-50-class-10-maths-cbse-5f7d4fa2d8cfdd6a04228d55
- http://oeis.org/wiki/Primes_coprime_to_30
- https://byjus.com/questions/which-of-the-following-numbers-are-co-prime-a-18-and-35-b-15-and-37-c-30-and-415-d-17-and-168-e-216-and-215-f-81-and-16/
- https://brainly.in/question/3855366
- https://www.cuemath.com/questions/which-of-the-following-numbers-are-co-prime/