Question
Three streetlights flash together. Each of them then
flashes after 0.35 seconds, 0.2 seconds, and 0.105 seconds respectively. After how many seconds will they all flash together again?Solution
0.35,  0.2,   0.105 multiplied by 0.001. 350,200,105 LCM of 350,200,105=4200 4200 × 0.001=4.2 =4.2
A sum of money doubles itself in 5 years in how many years it will be 3 times?
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Divide Rs 2500 into two parts such that the interest on one part at 12% for 2 years equals the interest on the other part at 6% for 4 years. Find the tw...
A certain sum when invested for 3 years in a scheme offering simple interest of 10% p.a. gives an interest of Rs. 765. What is 110% of the sum invested?
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