In a array x, count the number of times the number n appears in x.
for example: x = [1 2 3 4 3 2 1 2] and n = 2 the answer should be 3, because 2 appears 3 times in x
Sum the numbers on the main diagonal
What is Sum Of all elements of Matrix
Solving Quadratic Equations (Version 1)
Sum of the Multiplication of Vectors
How many complete pizzas (number 2)
Add the even numbers
Odd times 3
Check capital letters
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