Prelims

In the given figure, all line segments of the shaded portion are of the same length and at right angles to each other. The same can be cut out of a board of side 10 cm. What is the area of the shaded portion ?

If X = -2, then X^3 – X^2 – X – 1 is equal to

A rectangular water tank measures 15 m x 6 m at top and is 10 m deep. It is full of water. If water is drawn out lowering the level by 1 metre, how much of water has been drawn out ?

An accurate clock shows 8 O’clock in the morning. Through how many degrees will the hour hand rotate when the clock shows 2 O’clock in the afternoon ?

Assertion (A) : “DNA Finger- printing” has become a powerful tool to establish paternity and identity of criminals in rape and assault cases. Reason (R) : Trace evidences such as hairs, saliva and dried semen are adequate for DNA analysis.

Assertion (A) : In human beings, the females play a major role in determining the sex of the offspring. Reason (R) : Women have two- ‘X’ chromosomes.

Within biological communities, some species are important in determining the ability of a large number of other species to persist in the community. Such species are called

Consider the following statements : Hard water is not suitable for I. drinking. II. washing cloths with soap. III. use in boilers. IV. irrigating crops. Which of these statements are correct ?

Canola refers to special type of oil seed mustard varieties bred for human consumption. The main characteristic of these varieties is that the

The sensation of fatigue in the muscles after prolonged strenuous physical work is caused by