Q. Find the L.C.M. of y^7-1/y^5 and y^4+1+1/y^4

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40 marbles are equally divided among a certain number of children. If there were 2 children less, each would have received 1 more marble. Find the number of children. Soln: Let number of children be x. Then each student will get 40/x If there were 2 children less i.e x-2 then each woul ...
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Q. At what time will the compound interest payable half yearly on Rs 2400 be Rs 2646 at the 5% per 6 month? Soln: Given, Principal (P) = Rs. 2400 Compound Amount (C.A.) = Rs. 2646 here, 5% for 6 months. 5/6 % for 1 month (5/6)*12 for 12 mo ...