O is the circumcentre of $\triangle$ABC. If AO = 8 cm, then the length of BO is
1). 12 cm
2). 3 cm
3). 6 cm
4). 8 cm
.Instead of multiplying by 25, a student multiplies that number by 52 and gets 324 more than correct answer. Then that number is
1). 15
2). 12
3). 25
4). 32
India's population growth is characterized by
1). An increase in rate of death
2). An increase in the ratio of females
3). An increase in the birth rate and declining death rate
4). Increasing number of old people
In the following , out of the four alternatives, choose the word which best expresses the meaning of the given word and click the button corresponding to it.
RECEPTACLE
1). COMPARTMENT
2). HOLE
3). CONTAINER
4). FUNNEL
Sum of the factors of $4b^{2}c^{2}-(b^{2}+c^{2}-a^{2})$
1). a + b + c
2). 2(a + b + c)
3). 0
4). 1