Question:

If 2x – 1 + 2x + 1 = 80, then the value of x is

A.

8

B.

4

C.

20

D.

10

Answer» c. 20

Question:

A man deposited a sum of money to a bank at 9% simple interest p.a. The total interestthat he will get at the end of 5 years is 1,620. The deposited amount is

A.

6,000

B.

4,000

C.

3,600

D.

4,400

Answer» c. 3,600

Question:

In a certain time Rs. 1400 becomes Rs. 1848 at 8% p.a. simple interest. When 2,100will become 2,604 at the same time, the rate of interest is

A.

8.2%

B.

7%

C.

10%

D.

6%

Answer» d. 6%

Question:

The ratio of work done by (x + 2) men in (x – 2) days to that (x – 1) men in (x + 1) daysis 4 : 5, the value of x is

A.

+ 4

B.

6

C.

4

D.

8

Answer» c. 4

Question:

If A ∁ B and n (A) = 18, n (B) = 40, then n (A ∩ B) is

A.

18

B.

22

C.

58

D.

40

Answer» a. 18

Question:

If p varies directly as q and if q = 2 then p = 4. If p = 2, the value of q is

A.

1.5

B.

2

C.

1

D.

3

Answer» c. 1

Question:

If 2nP3 = 84. nP2, then the value of n is

A.

16

B.

11

C.

9

D.

6

Answer» b. 11

Question:

For a quadratic equation x2 – 2x + 1 = 0, the product of the roots is

A.

– 1

B.

1

D.

2

Answer» b. 1

Question:

The sum of the roots of the quadratic equation x2 – 3x = 0 is

A.

1

B.

0

C.

-3

D.

3

Answer» d. 3

Question:

The value of 3P3 – 3C3 is

A.

0

B.

5

C.

6

D.

1

Answer» b. 5