REVISION TEST

Customers are asked to stand in the lines. If one customer is extra in a line, then there would be two less lines. If one customer is less in line, there would be three more lines. Find the number of students in the class.

• 40

• 50

• 60

• 70

The sum of two digits and the number formed by interchanging its digit is 110. If ten is subtracted from the first number, the new number is 4 more than 5 times of the sum of the digits in the first number. Find the first number.

• 46

• 48

• 64

• 84

Five years ago, A was thrice as old as B and ten years later, A shall be twice as old as B. What is the present age of A.

• 20

• 50

• 60

• 40

What will be the solution of these equations ax+by=a-b, bx-ay=a+b ?

• x=1, y=2

• x=2, y=-1

• x=-2, y=-2

• x=1, y=-1

Rozly can row downstream 20km in 2 hours, and the upstream 4km in 2 hours. What will be the speed of rowing in still water?

• 6 km/hr

• 4 km/hr

• 3 km/hr

• 7 km/hr

For ax² + bx + c = 0, which of the following statement is wrong?

• If b² – 4ac is a perfect square, the roots are rational.

• If b² = 4ac , the roots are real and equal.

• If b² – 4ac is negative, no real roots exist.

• If b² = 4ac , the roots are real and unequal.

The roots of the equation 9x² – bx + 81 = 0 will be equal, if the value of b is

• ± 9

• ± 18

• ± 27

• ± 54

The first and last term of an A.P. are 1 and 11. If the sum of its terms is 36, then the number of terms will be

• 5

• 6

• 7

• 8

If 3 times the third term of an A.P. is equal to 5 times the fifth term. Then its 8th term is

• 0

• 1

• 2

• 3

The number of terms of an A.P. 3, 7, 11, 15... to be taken so that the sum is 406 is

• 5

• 10

• 12

• 14