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
Number of 1s in the Binary Representation of a Number
First N Perfect Squares
Is it an Armstrong number?
Is this triangle right-angled?
Change matrix to vector2
Reduce the logic
Odd times even numbers in a matrix
Second smallest number
Add the positive numbers
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