MBA Exam

A total of 810 balls are arranged in N layers. The ith layer from the top where 2<=i<=N has 4 more balls than the layer immediately above it. Which of the following is not a possible value of N?Explain.

1) 27
2) 18
3) 15
4) 10
5) 20

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MBA Other Question

The sum of the first and the third digits in a four-digit number equals the sum of the other two digits. The sum of its first two digits equals its last digit. Five times the last digit is equal to the sum of four times the third digit, twice the first digit and six times the second digit. How many four-digit numbers satisfy the given conditions?

1) 1
2) 2
3) 3
4) None of these
A
triangle ABC has its three sides in the ratio 2 : 3 : 4 and its
perimeter is 45 cm. A line DF is drawn parallel to BC and passing
through the mid point of AB meet CF at F. If the quadrilateral DBCF
formed is a parallelogram, what will be the minimum perimeter of the quadrilateral DBCF?1. 25 cm2. 30 cm3. 35 cm4. 55 cm5. 60 cm

1) 1
2) 2
3) 3
4) 4
5) 5