Class 7 / IIT Foundation Plus Maths / Primes And Composite Numbers / Sieve Of Eratosthenes, Twin Primes And Co-Primes

PRIME AND COMPOSITE NUMBERS

 PRIME AND COMPOSITE NUMBERS SIEVE OF ERATOSTHENES:- Step -I  Cross  out ‘1’ because it is not a prime number Step - II Encircle 2, cross out all the multiples of 2, ot