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how to correct reading comprehension in short span of time? i take 5-6 minutes in reading only and after that made 2-3 wrong answer.

A and B can do a piece of work in x days. If B increases its efficiency by 20% the work can be completed in 2 days less. if A alone can do a work in 30 days den B can complete the whole work in??????
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A group of 630 children are arranged for a group photograph session. Each row contains three fewer children than the row infront of it. What is the possible number of rows?

Where I get coupon number to enroll in test

what would i do to score max in eng section 

sbi po mocks in latest pattern

Q.99 , Probability , how result came to 95/663, 2 cards are taken from a pack of 52 cards , what is probability that none of these cards are black or face cards ???? Plz reply

find the range of all real values of x for which |3-5x| <7-8x

I how to solve parajumble quickly 

2 vessels contain a mixture of milk and water in the ratio 8:3 & 5:1 respectively.35 liters cask is filled with these vessels so as to make milk & water ratio 4:1.what % of total quantity from first vessel?