book Maths Puzzle Numerical Ability

What is an example of a number that isnt a "real number"?

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book Other Question

please help with this problem.

Solve the formula for the specified variable.

V = 1/4 Bh for B
I am trying to get into level 2 algebra at my comm. college. Its been almost 8 years since i've been in school, so im a little rusty!!! Here are a few examples if you could please