exam Maths Puzzle Numerical Ability

five divided by the difference of a number and 1 equals the quotient of 10 and the sum of the number and 9. find the number.

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exam Other Question

One typical application is to maximize profits. For example, a beauty parlor provides both highlighting and permanent wave services. It costs $5 in materials and requires 30 minute what is 49 in creased by twice a number when it is written in an algebraic expression?