## Ques 1.

A Person after allowing a trade discount of 105 from the marked price, makes a profit of 17% His marked price is

(a) 27 % above cost price

(b) 7 % above cost price

(c) 30 % above cost Price

(d) 34 % above cost price

**Ans 1.**Le the cost price be Rs 100 ad M.P. be Rs ( 100 + x).

. . ( 100+x) x 90/100 = ( 100 + 17)

=> x + 100 = 117/0.9 = 130

. . x = Rs 30

. . M.P. = 30% above C.P.

## Ques 2.

In a boarding house the number if boarders increases at a certain rate per cent yearly. Four years ago the number was 81; today it is 144. What will be the number of boarders 2 years hence ?

(a) 256

(b) 192

(c) 288

(d) 324

**Ans 2.**

## Ques 3.

A clock strike once at 1 o'clock , twice at 2 o'clock ,thrice at 3 o'clock and so on. What is the total number of strikings in a day ?

(a) 24

(b) 72

(c) 144

(d) 156

**Ans 3.**From 1 to 12, the clock would continue to strike and then start from 1 to12 in the same manner.

. . Sum of the number of strikes the clock makes from 1 to 12 [ i.e. 1 + 2+ 3 + 4 + ........+ 12]

= 12/2 {2 x 1 + 12- 1) 1}

{ Sum of A.P. = n/2[2a + n - 1) 1}

= 6 (13) = 78

. . Required number = 2 x 78 = 156.

## Ques 4.

Find the wrong number in the series given below:

2,11,20,26,32,37,41

(a) 26

(b) 20

(c) 11

(d) 32

**Ans 4.**41 - 37 = 4

37 - 32 = 5

32 - 36 = 6

26- 20 = 6 { It should be 7 ]

Hence, 20 is the wrong number.

## Ques 5.

A wrong number is there in the series given below. find out that number.

(2807, 1400, 697, 347, 171, 84, 41, 20

(a) 84

(b) 171

(c) 347

(d) 697

**Ans 5.**41 = (2) x 2 + 1

84 = (41) x 2 + 2

171 = (84) x 2 + 3

347 = (171) x 2 + 4

Hence, 347 is wrong.

## Ques 6.

What is the area of a circle which has the same circumference as the perimeter of a triangle whose sides are 9,10 and 17 cm ?

(a) 36 cm2

(b) 103 1/11 cm2

(c) 102 cm2

(d) None of these

**Ans 6.**Perimeter of the triangle = 9 + 10 + 17= 36 cm

circumference of circle = 2

## Ques 7.

The ratio of the length and the breadth of a rectangular plot is 2 : 1 . The owner spent Rs 330 for fencing the four sides of it at the rate of Rs. 1.10 per foot. Hw much in feet is the difference the length and the breadth of the plot ?

(a) 100

(b) 50

(c) 5

(d) 500

**Ans 7.**

## Three cubes of metal whose edges are in the ratio 3: 4: 5 are melted into a single cube, the length of whose diagonal is 48/3 m. Calculate the edges of the three cubes .

Ques 8.

(a) 22 m, 36 m, 42 m,

(b) 20 m, 38 m, 40 m,

(c) 24 m, 32 m, 40 m

(d) None of the above

**Ans 8.**

## A man buys at Rs 6 per litre and adds one third of water to it and sells the mixture at Rs 7.20 per litre . His gain is

Ques 9.

(a) 65%

(b) 60%

(c) 50%

(d) 43%

**Ans 9.**

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