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Everybody in a room shakes hands with everybody else. If the total number of handshakes is 66, then the total number of handshakes is 66, then the total number of persons in the room is:

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12
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NAGEEN PRAKASHAN ENGLISH-QUADRATIC EQUATIONS-Exercise 4d
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  2. The distance by road between two towns A and B, is 216km , by rail it ...

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  3. The speed of a boat in still water is 15 km/hr. It can go 30 km ups...

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  4. The speed of a boat in still water is 9 km/hr. It can go 12 km upstrea...

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  5. about to only mathematics

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  6. A trader bought a number of articles for RS.1200. Ten were damaged and...

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  7. Mohan sold an article for RS.56 which coste him RS.x. He finds that he...

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  8. A shopkeeper purchase a certain number of books for Rs 960. If the cos...

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  9. The hotel bill for a number of persons for overnight stay is Rs 4,800 ...

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  10. In an auditorium, seats are arranged in rows was equal to the number o...

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  11. At an annual function of a school each student gives gift to every oth...

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  12. A line segment AB is 8 cm in length. AB is produced to P such that BP^...

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  13. The product of 12% of an integer and 20% of the next integer is 61.2. ...

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  14. Girl! Out of a group of swans. 7/2 times the square root of the number...

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  15. In a class test, the sum of the marks obtained by P in Mathematics ...

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  16. The angry Arjun carried some arrows for fighting with Bheeshm. With ...

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  17. A piece of cloth costs RS.75. If the piece were 4 metre longer and eac...

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  18. Everybody in a room shakes hands with everybody else. If the total num...

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  19. P and Q are centres of circles of radii 9 cm and 2 cm respectively. PQ...

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  20. There is a two-digit number whose digits are the same, and has got th...

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