exam Maths Puzzle Numerical Ability

What is the square root of 8 times the aquare root of 12?

What is 3 times the aquare root of 5 times the aquare root of 5?

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exam Other Question

Combine like terms.
6a2 + 4a + 5 + 3a2 + 7a – 2
a man walks 9 blocks south,then decides to go back 4 blocks north.where does this bring him?