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using the number 3,3 ,make it equal to 20 using any mathematical operator

a is 30 percentage more efficient than b b works for 12 days and the remaining work is completed by a alone in 30 days in how many days will b working alone complete half the total work

The no of boys in a school was 30 more than the no of girls . Subsequently a few more girls joined the same school . Consequently the ratio becomes 3:5 .Find the minimum no of girls who joined su sequently.

A man swims from A to B and back in 4.5 hrs. A block of wood when allowed to go with the stream from A to B takes 6 hrs. what is the ratio of the speed of the man in still water to that of the stream?

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sir question hindi me nahi hoga

question hindi me

Sonal is 40yrs old & nitya is 60yrs old how many years ago was the ratio of their ages 3:5?
a) 5years b)10yrs c)20yrs d)37yrs e)none

If the income of Ram is 12 1/2% more than that of shyam,then the income of shyam is less than that of Ram by how much percentage?

please explain how to solve puzzles