exam Maths Puzzle Numerical Ability

I do not understand this at all. I am to evaluate this problem but I am just confused.

^3sqrt-27

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exam Other Question

This is the question. I do not understand how to figure this out. Thank you for your help.

Sue and Tom Wright are assistant professors at the local university. They each take ho If there are 20 football teams, how nany games will they have till the game is over? if all of them make the game each other.
Thank you.