Practice Set 10
1. Which number is neither a prime number nor a composite number?
2. Which of the following are pairs of co-primes?
(i) 8, 14
(ii) 4, 5
(iii) 17, 19 ) (iv) 27, 15
3. List the prime numbers from 25 to 100 and say how many they are.
4. Write all the twin prime numbers from 51 to 100.
5. Write 5 pairs of twin prime numbers from 1 to 50.
6. Which are the even prime numbers?
ترکیه
Let's learn.
Factorising a Number into its Prime Factors
A simple but important rule given by Euclid is often used to find the GCI
and LCM of numbers. The rule says that any composite number can be writ
product of prime numbers.
Answers
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Answer:
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Answered by
2
Answer:
Two numbers which have only 1 as a common factor are said to be co-prime or relatively prime or mutually prime numbers.
We can write 17 as 17 × 1 and 19 as 17 × 1.
Hence, 17 and 19 is a pair of co-prime numbers.
Step-by-step explanation:
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