; (29, 31) etc.
Practice Set 10
Which number is neither a prime number nor a composite number?
.. Which of the following are pairs of co-primes?
(i) 8, 14
(ii) 4, 5
(iii) 17, 19' (iv) 27, 1
List the prime numbers from 25 to 100 and say how many they are
Write all the twin prime numbers from 51 to 100.
Write 5 pairs of twin prime numbers from 1 to 50.
Which are the even prime numbers?
Let's learn.
Factorising a Number into its Prime Fac
A simple but important rule given by Euclid is often used to find
d LCM of numbers. The rule says that any composite number can
oduct of prime numbers.
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