15 tennis players take part in a tournament. Every player plays twice with each of his opponents. How many games are to be played?
Formula: 15C215C2 x 2. So 15 x (15 - 1) = 15 x 14 = 210
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1, 11, 21, 1211, 111221, 312211, . . . . . what is the next term in the series? |
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How many five digit numbers are there such that two left most digits are even and remaining are odd. |
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13_46_8_180_210_75 = 64 . Use + and - in the empty places to make the equation holds good. Take m = number of + and n = number of - . Find m - n? |
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If a refrigerator contains 12 cans such that 7 blue cans and 5 red cans. In how many ways can we remove 8 cans so that atleast 1 blue can and 1 red can remains in the refrigerator. |
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Find the 8th term in series?2, 2, 12, 12, 30, 30, - - - - - |
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Find the next three terms of the series;1, 4, 9, 18, 35 - - - - - |
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Rahul took a part in cycling game where 1/5 ahead of him and 5/6 behind him then total number of participants = |
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Data sufficiency question: What are the speeds two trains travels with 80 yards and 85 yards long respectively? (Assume that former is faster than later) a) they take 75 seconds to pass each other in opposite direction. b) they take 37.5 seconds to pass each other in same direction |
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Reversing the digits of fathers age we get sons age. One year ago father was twice in age of that of his son? find their current ages? |
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Jack and Jill went up and down a hill. They started from the bottom and Jack met Jill again 20 miles from the top while returning. Jack completed the race 1 min a head of Jill. If the hill is 440 miles high and their speed while down journey is 1.5 times the up journey. How long it took for the Jack to complete the race ? |
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