exam Maths Puzzle Numerical Ability

Problem: Find the number of permutations of the first 8 letters of the alphebet for each situation.

25. taking 5 letters at a time

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Find the area of a rectangle that is 3 times as long as it is wide. Express your answer in terms of w, the width of the rectangle in feet. The Red Machine makes 120 candies per minute. The Blue Machine makes 3 candies per second. How many Red Machines would you need if you wanted to equal the productivity of 4 Blue Machines.