More Problems

• Count how many columns in a 2D matrix contain only prime numbers.
• Find the product of all elements that are at even indices in an array.
• Find the sum of the second largest and second smallest elements in an array.
• Replace all negative numbers in an array with the absolute value of their index.
• Check if an array of integers forms a Fibonacci sequence.
• Find the smallest element in an array that is not a prime number.
• Find the largest element in an array that is a prime number.
• Check if an array contains at least one element that is divisible by the length of the array.