Tennis players take part in a tournament. Every player plays twice with each of his opponents. How many games are to be played?
We can select two teams out of 15 in $^{15}C_{2}$ ways. So each team plays with other team once. Now to play two games, we have to conduct $^{15}C_{2}$ x 2 = 210 games.
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7528 : 5306 :: 4673 : ? |
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$x^2-y^2$=16 and xy = 15 so find out x + y |
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Census population of a district in 1981 was 4.54 Lakhs, while in year 2001 it was 7.44 Lakhs. What was the estimated mid-year population of that district in year 2009. |
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Find the maximum value of n such that 50! is perfectly divisible by $2520^n$ . |
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A girl leaves from her home. She first walks 30 metres in North-west direction and then 30 metres in South-west direction. Next, she walks 30 metres in South-east direction. Finally, she turns towards her house. In which direction is she moving? |
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There is well of depth 30 m and frog is at bottom of the well. He jumps 3 m in one day and falls back 2 m in the same day. How many days will it take for the frog to come out of the well? |
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Find the next term in the given series |
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A train leaves Meerut at 5 a.m. and reaches Delhi at 9 a.m. Another train leaves Delhi at 7 a.m. and reaches Meerut at 10.30 a.m. At what time do the two trains travel in order to cross each other ? |
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`A` and `B` started a business in partnership investing Rs 20000/- and Rs 15000/- respectively. After six months `C` jointed them with Rs 20000/-. What will be B`s share in the total profit of Rs 25000/- earned at the end of two years from the starting of the business? |
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What is the 8th term in the series 1, 4, 9, 18, 35, 68, . . . |
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