661: Protective action against harmful household insects and pests can be taken by the use of
(a) Infrasonic waves
(b) Microwaves
(c) Ultrasonic waves
(d) Low frequency radio waves
662: If the price of a television set is increased by 25%. then by what percentage should the new price be reduced to bring the price back to the original level ?
(a) 15%
(b) 25%
(c) 20%
(d) 30%
663: Thillana is a format of
(a) Kathak
(b) Kuchipudi
(c) Odissi
(d) Bharatnatyam
664: Two trains leave New Delhi at the same time. One travels north at 60 kmph and the other travels south at 40 kmph. After how many hours will the trains be 150 km apart ?
(A) 4/3
(B) 3/2
(C) 3/4
(D) 15/2
665: Liberty, Equality and Fraternity, this inspiration was derived from:
(a) American Revolution
(b) French Revolution
(c) Russian Revolution
(d) None of the above