A boat covers a distance of 30 km downstream in 2 hours while it takes 6 hours to cover the same distance upstream. What is the speed of the boat in km/hr ? Answer : C. 10 View Answer

A motorboat whose speed is 15 km/hr in still water goes 30km downstream and comes back in four and a half hours. The speed of the stream is ? Answer : D. 5 km/hr View Answer

Four whole number taken at random are multiplied together. The chance that the last digit of the product is 1, 3, 7, or 9 is ? Answer : A. 16/625 View Answer

A brother and sister appear for an interview against two vacant posts in an office. The probability of the brother’s selection is 1/5th and that of the sister’s selections is 1/3rd. What is the probability that one of them is selected ? Answer : B. 2/5 View Answer

A bag contains 8 red and 5 white balls. 2 balls are drawn at random. What is the probability that both are white ? Answer : D. 5/39 View Answer

If the probability that A will live 15 year is 7/8 and that B will live 15 year is 9/10, then what is the probability that both will live after 15 year ? Answer : B. 63/80 View Answer

Three unbiased coins are tossed. What is the probability of getting at most two heads ? Answer : D. 7/8… View Answer

log10(10) + log10(100) + log10(1000) + log10(10000) + log10(100000) is equal to ? Answer : A. 15 View Answer