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Start learning 50% faster. Sign in nowDiamonds sparkle because of the total internal reflection of light. Diamonds have a very high refractive index, meaning they slow light down much more than glass; and if cut in the right manner, the angles of incidence can be made so that light seems to get 'trapped' within the diamond giving it it's sparkly appearance.
A policeman sees a thief from a distance of 68 m. The thief starts running and the policewoman chases him. The thief and the policeman run at the spee...
Two friends, Ammu and Beenu, had some candies. One of them had 10 more candies than the other. The candies Ammu had were 60% of the total candies they h...
Amit can complete a task alone in 20 days. Bheema and Chetna, working together, can complete the same task in 12 days. The ratio ...
Two pipes A and B can fill a tank in 15 hours and 20 hours, respectively. If both pipes are opened together and then pipe A is closed after 5 hours, how...
A merchant has two types of sugar. Type A costs 50 per kg, and Type B costs 70 per kg. In what ratio should the two types be mixed to get a mixture that...
How many possible values can the digit 'k' take if the number 9458k2 is divisible by 8?
Aman invested Rs. 13,000 in a scheme offering simple interest of 20% p.a. For how many months should he keep his money invested in the scheme if he wish...
{19.13 2 – 24.86 2 + 84.92% of 501.16} = ?
The length of a rectangle is increased by 20% and the width is decreased by 10%. What is the percentage change in the area of the rectangle?
A tank is filled with 3 inlet pipes and 2 outlet pipes. Inlet pipes A, B, and C can fill the tank in 6 hours, 8 hours, and 12 hours, respectively. Outle...
