BRAIN-O-MATHS

MATHS & MATHEMATICAL RESONING

RULES :-10 points for correct answer & -5 for wrong answerFor answering, you have to raise your hand firstIf first one to answer is wrong, chance would be

given to the second person who raised his/her hand.Maximum two people would be allowed to answer a

question.You are bound to answer if you have raised your

hand.

The number of 3-digit numbers divisible by 7, is ………….. .

a) 125

b) 128

c) 150

d) 151

1.

4, 6, 12, 10, 13, 39, ?

a) 37

b) 78

c) 43

d) 36

2.

A train 140m long is running at 72kmph. In how much time will it pass a platform 460m long?

a) 15sec

b) 24sec

c) 28sec

d) 30sec

3.

The sum of ages of 6 children born at the intervals of 4 years each is 96 years. Find out the age of the youngest child?

a) 6years

b) 5years

c) 4years

d) 3years

4.

A bag contains 2 white balls, 3 black balls and 4 red balls. In how many ways can 3 balls be drawn from the bag, if at least one red ball is to be included in the draw?

a) 32

b) 64

c) 74

d) 128

5.

logₓ(9/16)=−(1/4), find the value of x

a) (9/16)⁸

b) (3/4)4

c) (16/9)⁸

d) (4/3)8

6.

36120=(36 * x)40. What is the value of x?

a) 6

b) 62

c) 63

d) 64

7.

Arrange in descending order

a) 25/11

b) 33/14

c) 47/21

d) 38/16

8.

A container contains 50 litres of milk. From this container 10 litres of milk was taken out and replaced by water. This process was repeated further three times. How much milk is now contained by the container?

a) 29.16

b) 20.48

c) 20

d) 10

9.

What is the sum of the exterior angles of an polygon?

a) 360

b) 480

c) 600

d) 720

10.

Triangle ABC is right-angled at A, and AD is the altitude from A to the hypotenuse BC. Find x.

a) 15

b) 12

c) 10.5

d) 7.9

11.

What is the surface area of the torus (to the nearest mm2) ?

a) 2256 mm2

b) 2369 mm2

c) 3948 mm2

d) 5922 mm2

12.

r = 5 mm & R = 20 mm

How many diagonals does an nineteen-sided polygon have?

a) 135

b) 144

c) 152

d) 153

13.

Here is a sheet with white and black squares: Which of the sheets below

could it be covered with to get a totally black rectangle?

a) b)

c) d)

14.

Arrange the number in ascending order

a) 9/32

b) 7/26

c) 8/29

d) 6/23

15.