exam Maths Puzzle Numerical Ability

Hi this is my math question....

72 divided by 9+ 56 divided by 7

Do u start backwardse or frontwardse??

Explain Please.

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exam Other Question
If five people are wearing five different hats, and each person is given a random hat, what is the probability that all five people get the correct hat?

i tried and tried on this one, but i failed. Help! :-( I am having trouble solving this problem. It is a homework assignment due Tuesday! Thank you so very much!! Please show the steps on how to solve also. Thanks!! Rationalize the denominator:

5/(sqrt6)+(sqrt5)