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Q. If 30 oxen can plough 1/7 th of a field in 2 days, how many days 18 oxen will take to do the remaining work?
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Q. Three- fifth of the square of a certain number is 126.15 what is the number?
Q. Find the average of all prime numbers between 30 and 50.
Q. What sum of money will amount to Rs. 520 in 5 years and to Rs. 568 in 7 years at simple interest?
Q. The smallest number, which when increased by 5 is divisible by each of 24,32, 36 and 564, is
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