MBA Exam

N taps numbered from 1 to N are fitted to tank.The rate at which nth tap for n=1,2,3.... N fill the tank.equals the sum of rate of all the taps numbered below it. If the sixth tap ca fill it in 80 mins.Find the time in which the ninth tap can fill it (mins)

1) 10
2) 5
3) 20
4) 40
5) 25

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MBA Other Question
Let N = 7x12 + 8x9 + 9x6 – x4 – 2x3 – 3x2 + 169 with x = 6m + n where m and n are natural numbers and m < n < 6. What is the remainder when N is divided by 6?

1) 1
2) 2
3) 3
4) 4
5) 5
 Acc. to a plan a drilling team had to drill a depth of 270 mtrs. below the ground level. For the first 3 days the team drilled as per the plan. However subsequently finding that their resources were getting underutilized acc. to the plan, it started to drill 8 more mtrs. than the plan every day. therefore the day before the planned date they had drilled to a depth of 280 mtrs. how many mtrs of drilling was the plan for each day.

1) 38 metres
2) 30 metres
3) 27 metres
4) 28 metres