If x is decreased from 2 to -2 , which of the following must increase ? A) 2+x B. 5-x^2 C) 1+(1/x) D) 1/(x-3) Answer : A) 2+2=4 ; 2-2=0 So, it is decreased 5-2^2=1 ; 5-(-2)^2=1 Remain same C) 1+(1/2)=3/2 ; 1-(1/2)=(1/2) It is decreased D) 1/(2-3)=-1 ; 1/(-2-3)=1/(-5) It is increased So Answer : D ••••••••••••••• ••••••••••••••• ••• In a class of 25 students, 10 have less than 6 marbles, 10 have more than 7 marbles, 4 have more than 8 marbles.How many students have more than 5 marbles but less than 9 marbles? A) 10 B. 11 C) 12 D) 13 E) None Answer : 10 students have < 6 marbles # 10 students have > 7 marbles 4 students have > 8 marbles # 1 students have < 9 marbles So 10+1 that is 11 (Ans.) ••••••••••••••• ••••••••••••••• ••• A jogger running at 9 kmph alongside a railway track is 240 metres ahead of the engine of a 120 metres long train running at 45 kmph in the same direction.In how much time will the train pass the jogger ? A) 3.6 sec B. 18 sec C) 36 sec D) 72 sec E) N...
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