P&C-7 (CAT-2004)

N persons stand on the circumference of a circle at distinct points. Each possible pair of persons, not standing next to each other, sings a two-minute song one pair after the other. If the total time taken for singing is 28 minutes, what is N?

(1) 5

(2) 7

(3) 9

(4) None of these

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Numbers-11 (CAT-2004)

Suppose n is an integer such that the sum of digits of n is 2,
and 10¹⁰ < n < 10¹¹. The number of different values for n is:

 (1) 11      (2) 10     (3) 9       (4) 8
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Numbers-10 (CAT-2004)

The total number of integer pairs (x,y) satisfying the equation x+y=xy is:

(1) 0      (2) 1     (3) 2       (4) none of these

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Arithmetic-16 (CAT-2004)

If a man cycles at 10 km/hr, he arrives at a certain place at 1 p.m. If he cycles at 15 km/hr, he will arrive at the same place at 11 a.m. At what speed must he cycle to get there at noon? 

(1) 11 km/hr

(2) 12 km/hr

(3) 13 km/hr

(4) 14 km/hr

For Answer Click on "Read more" below: