exam Maths Puzzle Numerical Ability

find the number of permutations of the first 8 letters of the alphabet for each situation. taking all 8 letters at a time

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exam Other Question

Solve for q:
g+q=r Suppose you are starting an office-cleaning service. You have spent $315 on equipment. To clean each office you use $4 worth of supplies. You charge $25 per office. How many offices must you clean to break even?