3631: In a family, a couple has a son and a daughter. The age of the father is three times that of his daughter and the age of the son is half of his mother. The wife is nine years younger to her husband and the brother is seven years older than his sister. What is the age of the mother ?
(a) 40 years
(b) 45 years
(c) 50 years
(d) 60 years
3632: In a class there are 18 boys who are over 160 cm tall. If these constitute three- fourths of the boys and the total number of boys is two-thirds of the total number of students in the class, what is the number of girls in the class?
(a) 24
(b) 6
(c) 12
(d) 18
3633: Match the areas shown as A, B, C and D on the given map showing with the largest religious minorities. Select the correct answer using the codes given below the list of minorities.
Largest Religious Minorities
1. Buddhists
2. Christians
3. Jains
4. Muslims
5. Sikhs
Codes:
(a) A-5, B-1, C-3, D-2
(b) A-4, B-3, C-2, D-1
(c) A-5, B-3, C-1, D-2
(d) A-4, B-2, C-1, D-3
3634: Assertion (A):
Coal-based thermal power stations contribute to acid-rain.
Reason (R):
Oxides of carbon are emitted when the coal burns.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually true but R is NOT the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
3635: According to the World Health Organisation, the disease which causes the death of the largest number of people today is
(a) AIDS
(b) Tuberculosis
(c) Malaria
(d) Ebola