exam Maths Puzzle Numerical Ability

A locksmith charges $40 plus $28 for each lock installed. How many locks can be replaced for $236?

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exam Other Question

Lets say you were given the following problem:
A 20 foot ladder is leaning against a wall. The base of the ladder is 3 feet from the wall. What angle does the ladder make with the ground?

How would you solve this? Help me please ive tried to rearrange an equation but i keep getting lost

Reaarange X = 1/2A In(q - 3) + c to obtain q