666: Five balls of different colours are to be placed in three different boxes such that any box contains at least one ball. What is the maximum number of different ways in which this can be done?
(A) 120
(B) 90
(C) 180
(D) 150
667: The following table shows the percentage change in the consumption of electricity by five towns P, Q, R, S, T from 1986 to 1988 :
If town T consumed 500,000 units in 1986, how much did it consume in 1988 ?
(a) 371,000 units
(b) 531,100 units
(c) 551,100 units
(d) 571,100 units
668: Humidity of the air:
(a) Increases with the increase in atmospheric temperature
(b) Decreases with the increase in atmospheric temperature
(c) Is not affected by the change in atmospheric temperature
(d) Does not show any consistent behaviour with the change in atmospheric temperature
669: The term apabhramsa was used in medieval Sanskrit texts to denote
(a) outcastes among the Rajputs
(b) deviations from Vedic rituals
(c) early forms of some of the modern Indian languages
(d) non-Sanskrit verse metres
670: The letters L, M, N, O, P, Q, R, S and T in their order are substituted by nine integers 1 to 9 but not in that order, 4 is assigned to P. The difference between P and T is 5. The difference between N and T is 3. What is the integer assigned to N?
(a) 7
(b) 5
(c) 4
(d) 6