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Q. To gain 10% on selling sample of milk at the cost price of pure milk, the quantity of water to be mixed with 50 kg. of pure milk is:
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Q. At what rate percent per annum will a sum of money double in 8 years.
Q. At what time between 4 and 5 O' clock will the hands of a clock be at right angle?
Q. What sum will amount to Rs. 7000 in 5 years at 10/3 % simple interest ?
Q. A discount series of 10%, 20% and 40% is equal to single discount of ?
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