exam Maths Puzzle Numerical Ability

The qoutient of two numbers is 8 and their sum is 90. Find the number ?

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exam Other Question

The cost in dollars of manufacturing (w) wing nuts is given by the expression 0.07w + 13.3.
Find the cost when 375 wing nuts are made. What is the average cost to manufacture one wing nut? Can someone help me to solve the equation?

square root of x + 5 + x = 1