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If amount on the principal of Rs 6,000 is written as 6000 and compound interest payable half yearly, then rate of interest p.a. is _________ and time in years is _________.

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The compound interest on Rs 8,000 for one year at 16% p.a. compounded half yearly is _________, given that (1.08)2 = 1.1664.

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In the first year on an investment of Rs 6,00,000 the loss is 5% and in the second year the gain is 10%, the net result is _________.

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By selling an article for Rs 1,12,000 a girl gains 40%. The cost price of the article was _________.

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The loss per cent on selling 140 geometry boxes at the loss of S.P. of 10 geometry boxes is equal to _________.