PHP Taskbook Level 10.4

Given a text with words. Mix all the words of this text in random order.

Given two numbers, display the process of finding the LCM, as in school.

Given two numbers, display the process of finding the GCD, as in school.

Given an arbitrary two-dimensional array:

[
	[11, 12, 13, 14, 15],
	[21, 22, 23, 24, 25],
	[31, 32, 33, 34, 35],
	[41, 42, 43, 44, 45],
	[51, 52, 53, 54, 55],
]

Write code that will reset the specified column:

[
	[11, 12,  0, 14, 15],
	[21, 22,  0, 24, 25],
	[31, 32,  0, 34, 35],
	[41, 42,  0, 44, 45],
	[51, 52,  0, 54, 55],
]