Exam Maths Puzzle Numerical Ability Algebra

1. The cost price of 10 articles is equal to the selling price of 9 articles. find the profit percent.
a. 101/9 % b. 100/9 % c. 102/9 % d. 103/9 %

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Exam Other Question

sum of money doubles itself in 9 years, in how many years it will become 8 times itself?
Sol: 27 years; 9yrs = 2(sum); 18yrs = 4(sum); 27yrs = 8(sum)

Below equation is one the most popular equation.Can you solve the below equation by replacing alphabet with a digit such that the equation holds as well?
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MONEY