More Problems

• Write a program to print all the elements in the second diagonal of a square matrix that are multiples of 3.
• Write a program to print all the prime numbers in the first and last rows of the matrix.
• Write a program to print all the prime numbers in the first and last columns of the matrix.
• Write a program to check if the sum of all diagonal elements is an odd number.
• Write a program to check if the product of all border elements is an even number.
• Write a program to replace all the prime elements in the matrix with their negatives.
• Write a program to replace all the composite elements in the matrix with their negatives.
• Write a program to count how many elements in the matrix are prime and even.