any trick to find whether the given number is prime or not
You can find out whether the number is prime or not through the method of factorization only. There is no other trick for it.
verify whether 223 is a prime number or not
Is there any trick to find the products of two or three matrices of order 3×3 quickly?
Using euclid's division algorithm find whether the pair of numbers 847 and 2160 are co primes or not