MBA Exam Numerical Ability Quadratic Equations

Six men are in a queue at the ticket counter of ‘PVR’ movie theater. All of them want to buy a ticket which costs Rs. 75. Each of the six men has exactly one ‘currency note’. Three of the men have 75 rupee-note and other three have 150 rupee-note. There are no ‘ currency notes’ of any kind at the ticket counter initially. In how many different ways six men can be arranged in the queue such that there is no problem of extending change at the ticket counter?

1) 144
2) 252
3) 216
4) 180

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MBA Other Question
A and B are the two opposite ends of a swimming pool and the distance between them is 420 metres. Ankur and Manu start swimming towards each other at the same time from A and B, with speeds in the ratio 5 : 9 respectively. As soon as any of them reaches an end, he turns back and starts swimming towards the other end. At what distance (in metres) from A will they meet when Manu is in his 13th round? Note: A to B is considered one round and B to A another round.(a) 405 (b) 330 (c) 240 (d) 280 (e) 210

1) a
2) b
3) c
4) d
5) e
 In how many ways can eight people comprising four married couples sit at a circular table such that no two men sit together and no husband sits beside his wife?

1) 8
2) 2
3) 16
4) 12