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21 women can complete a piece of work in 20 days by working 10 hours a day in how many days 21 men will be complete the work by working 8 hours a day if 3 men work as much as 5 women ?

if the difference between CI and SI at the end of 2 years is Rs 100, then the principal given the rate is 5% per annum in the both the cases and the principal is also the same for both the cases?

In an election between two candidates, one got 55% of total valid votes and 20% of the total votes casted were invalid. If total votes was 7500, then what is the no of valid votes that the other person got?

Is colour Admit card is required for exam

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a^2+a+1=0 then a^5+a^4+1=

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A and B together invest 20,000 in a business they started . B received 4500 as his share from the profit earned.the respective ratio between the total earned amount invested by B is 5:8. what was the amount invested by A.( consider that A and B invested for an equal amount of time).