Find the value of x.

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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 ...
In the given figure, O is the center of the circle. If ABOC is a rhombus, find the value of angle BAC. Soln: if angle BOC=x then reflex angle BOC=360-xnow angle BAC=(1/2) reflex angle BOC=180-x/2thenangle BAC=angle BOCx=180-x/2x=120 ...
The annual compound interest on a sum of money in 2 years and 3 years are Rs. 210 and Rs. 331. Find the interest rate and principal. Soln: ...
Q. A dealer sold a photocopy machine for Rs. 4,20,000 plus adding 13% VAT to the retailer. If the retailer spent Rs. 2,500 on transportation cost, Rs. 4,000 on local tax and made Rs. 20,000 profit and then supplied to a customer, how much did the customer pay the VAT amount at the present rate of VAT? Soln: ...
A card is drawn randomly from the pack of 52 cards, find the probability of getting neither a king nor an ace. Soln: probability that the drawn card will be either king or an ace is 4/52 + 4/52 = 2/13 probability that it will neither be ...