exam Maths Puzzle Numerical Ability

Simplify:

SQRT 500

I believe the answer is 250, is this correct? Thank you

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exam Other Question

The point (2, -5) is a solution to which of the following equations?
y = -3x + 1

y = -3x - 5

y = -3x - 3

y = -3x + 5 Celia bought 14 apples, ate 2 of them, and the rest ate 20c more per apple than she paik. Her total profit waas $1.00. How much did she sell each apple for?.
Thank you for helping