56: 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
57: Civil Disobedience Movement was started in India in 1930 for:
(a) Home rule
(b) Purna Swaraj
(c) Non-cooperation with British government
(d) Hindu-Muslim unity
58: Which principle among the following was added to the Directive Principles of State Policy by the 42nd Amendment to the Constitution?
(a) Equal pay for equal work for both men and women
(b) Participation of workers in the management of industries
(c) Right to work, education and public assistance
(d) Securing living wage and human conditions of work to workers
59: Which one of the following statements is not correct ?
(a) All echinoderms are viviparous
(b) Round worm has no circulatory system
(c) In bony fishes, swim bladder is usually present
(d) In cartilaginous fishes, fertilisation is internal
60: A person has 4 coins each of different denomination. What is the number of different sums of money the person can form (using one or more coins at a time)?
(A) 15
(B) 16
(C) 10
(D) 12