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Task 1: "Ugly Numbers
You are given an integer $n >= 1.
Write a script to find the $nth element of Ugly Numbers.
Ugly numbers are those number whose prime factors are 2, 3 or 5.
For example, the first 10 Ugly Numbers are 1, 2, 3, 4, 5, 6, 8, 9, 10, 12.
Example
Input: $n = 7
Output: 8
Input: $n = 10
Output: 12
"
My notes: sounds quite simple. I thought of digging out primes and
factors code from previous PWCs, but the only primes we care about are
2, 3 and 5.
Task 2: "Square Points
You are given coordinates of four points
i.e. (x1, y1), (x2, y2), (x3, y3) and (x4, y4).
Write a script to find out if the given four points form a square.
Example
Input: x1 = 10, y1 = 20
x2 = 20, y2 = 20
x3 = 20, y3 = 10
x4 = 10, y4 = 10
Output: 1 as the given coordinates form a square.
Input: x1 = 12, y1 = 24
x2 = 16, y2 = 10
x3 = 20, y3 = 12
x4 = 18, y4 = 16
Output: 0 as the given coordinates doesn't form a square.
"
My notes: sounds surprisingly easy for a task 2. I guess the points
can be in any order.
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