Pre Boards

Practice to excel and get familiar with the paper pattern and the type of questions. Check you answers with answer keys provided.

Sample Papers

Download the PDF Sample Papers Free for off line practice and view the Solutions online.

CNET Life Sciences Solved Question Paper 2016

Multiple Choice Questions

11.

A normal TV screen has a width to height ratio of 4 : 3, while a high definition TV screen has a ratio of 16:9. What is the approximate ratio of their diagonals, if the heights of the two types of screens are the same?

5: 9
5: 18
5: 15
5: 6

12.

Comparing numerical values, which of the following is different from the rest?

The ratio of the circumference of a circle to its diameter.
The sum of the three angles of a plant triangle expressed in radians.
22/7
The net volume of a hemisphere of unit radius, and a cone of unit radius and unit height.

13.

A river is 4.1 km wide. A bridge built across it has 1/7 of its length on one bank and 1/8 of its length on the other bank. What is the total length of the bridge?

5.1 km
4.9 km
5.6 km
5.4 km

14.

OA, OB, and OC are radii of the quarter circle shown in the figure. AB is also equal to the radius.

What is angle OCB?

60°
75°
55°
65°

15.

Two iron spheres of radii 12 cm and 1 cm are melted and fused. Two new spheres are made without any loss of iron. Their possible radii could be

9 and 4 cm
9 and 10 cm
8 and 5 cm
2 and 11 cm

16.

A man buys alcohol at Rs. 75/cL, adds water and sells it at Rs. 75/cL making a profit of 50%. What is the ratio of alcohol to water?

17.

The sum of the digits of a two-digit number is 9. If the fraction formed by taking 9 less than the number as numerator and 9 more than the number as the denominator is 3/4, what is the number?

18.

The distance between X and Y is 1000 km. A person flies from X at 8 AM local time and reaches Y at 10 AM local time. He flies back after a halt of 4 hours at Y and reaches X at 4 PM local time on the same day. What is his average speed for the duration he is in the air?

500 km/ hour
250 km/ hour
750 km/ hour
Cannot be calculated with the given information.

19.
If a person travels x% faster than normal, he reaches y minutes earlier than normal. What is his normal time of travel?

$(\frac{y}{100} + 1) x minutes$

$(\frac{100}{y} + 1) x minutes$

$(\frac{100}{x} + 1) y minutes$

Normally considering, distance = speed ^ time

Modified case, (speed + $\frac{x \times speed}{100} = \frac{distance}{(time - y)}$

or, speed (1 + $\frac{x}{100}) = \frac{distance}{(time - y)}$

Substituting for distance, speed $(1 + \frac{x}{100}) = \frac{speed * time}{(time - y)}$

on cancelling speed on RHS and LHS,

1 + x/100 = time/ time - y

time = time - y + (time - y)/ 100

100 time = 100 time - 100 y + time - xy

x time = 100y + xy

time = (100/ x + 1) y minutes.

20.

A and B walk up an escalator one step at a time, while the escalator itself moves up at a constant speed. A walks twice as fast as B. A reaches the top in 40 steps and B in 30 steps. How many steps of the escalator can be seen when it is not moving?