exam Maths Puzzle Numerical Ability

Express both in terms of x

1. ln(x) = 2

what I thought was x = e^2 but that seemed too simple

2. tan^-1 x = 1

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exam Other Question

1/2 + (2/3 divide 3/4) - (4/5 x 5/6)= I have NO clue where to start.
Give a counterexample to show the statement is not always true for real numbers a, b, & c. If a