exam Maths Puzzle Numerical Ability

How would I do this kind of problem

A telephone number consists of seven digits, the first three representing the exchange. How many different telephone numbers are possible within the 537 exchange?

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exam Other Question
Use synthetic division to find the value of f (-2) for f (x) =
x ^3 - 3x^2 - x - 9. Hello,

What is the quotient of:

36x^7 / (3x^3)

thank you.