exam Maths Puzzle Numerical Ability

Problem:
Find the slope of the line through the given points

(2,1), (2,7)

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exam Other Question

if i represents the imaginary number whose square is -1,then (radical2 + radical2 x i)^4= ? Avaition:

A helicopter, flying directly over a fishing boat at an altitude of 1200 ft., spots an ocean liner at a 15 degree angle of depression. How far from the boat is the lin