Q: A car finishes a journey in ten hours at the speed of 65 km/hr. If the same distance is to be covered in five hours how much more speed does the car have to gain?
Options:
(A) 8 km/hr
(B) 10 km/hr
(C) 65 km/hr
(D) 16 km/hr
(E) None of these
A: OK... Stream of consciousness: Distance covered by the car = 65 10 = 650 km
\ Speed = 6505 = 130 km/hr
\ Speed gain = 130 65 = 65 km/hr
The answer is (C).

Q: 100 is increased by 50%. Find the final number.
Options:
(A) 100
(B) 110
(C) 150
(D) 155
(E) 160
A: OK... Stream of consciousness: Final number = Initial number + 50%(original number) = 100 + 50%(100) = 100 + 50 = 150.
The answer is (C).

Q: If the given two numbers are respectively 7% and 14% of a third number, then what percentage is the first of the second ?
Options:
(A) 20%
(B) 25%
(C) 18%
(D) 50%
(E) none of these
A: OK... Stream of consciousness: Here, l = 7 and m = 14
Therefore, first number = l/m x 100% of second number = 7/14 x 100% of second number = 50% of second number
The answer is (D).

Q: Grace has 17 jellybeans in her pocket. She has 9 red ones, 4 green ones, and 4 blue ones. What is the minimum number of jellybeans she must take out of her pocket to ensure that she has one of each color?
Options:
(A) 4
(B) 8
(C) 12
(D) 14
(E) 16
A:
OK... Stream of consciousness: The worst scenario is when she takes 9 red and 4 green, total of 13 jellybeans, and still doesn't have 3 distinct colors. But the next draw (14th) will surely be the third color jellybean (blue) as there is no other color jellybeans left in pocket.
The answer is (D).