Exam Maths Puzzle Category

A restaurant prepares 22 litres of a mixture that contains 25% of orange essence and the remaining quantity as water. If 3 litres of water is mixed in this mixture,what will be the percentage of orange essence in the new mixture?

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Exam Other Question

in a family two childrens are there.1st children started to save rs.250 from his 20 th birthday and 2nd children started to take from 1st children's saving rs.50 per year.at his 60th birthday(1st children),he could find only rs.500 in his savings. how? 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)