question: If rupee one produces rupees nine over a period of 40 years, find the rate of simple interest?
Options:
(A) 22 1/9 %
(B) 22 2/2 %
(C) 23 1/2 %
(D) 22 1/2 %
(E) 62 1/2 %
answer: Stream of consciousness: 9 = (1*40*R)/100
R = 22 1/2 % The answer is (D).

q: A boy multiplied 987 by a certain number and obtained 559981 as his answer. If in the answer both 9 are wrong and the other digits are correct, then the correct answer would be:
Options:
(A) 553681
(B) 555181
(C) 555681
(D) 556581
(E) 556881
a: Stream of consciousness: 987 = 3 x 7 x 47
So, the required number must be divisible by each one of 3, 7, 47
553681->(Sum of digits = 28, not divisible by 3)
555181->(Sum of digits = 25, not divisible by 3)
555681 is divisible by 3, 7, 47 The answer is (C).

question: A car finishes a journey in ten hours at the speed of 80 km/hr. If the same distance is to be covered in eight hours how much more speed does the car have to gain?
Options:
(A) 8 km/hr
(B) 10 km/hr
(C) 12 km/hr
(D) 16 km/hr
(E) None of these
answer: Stream of consciousness: Distance covered by the car = 80 10 = 800 km
\ Speed = 8008 = 100 km/hr
\ Speed gain = 100 80 = 20 km/hr The answer is (E).

q: If O is the center of the circle in the figure above and the area of the unshaded sector is 5, what is the area of the shaded region?
Options:
(A) 25/
(B) 30/
(C) 20
(D) twenty five (25)
(E) 30
a: Stream of consciousness: 60/360 = 1/6
1/6 of total area = 5
5/6 of total area = 5*5 = 25 The answer is (D).

question: The total number of apples and oranges in the refrigerator is 7 more than the total number of oranges and peaches in the refrigerator. How much lesser is the number of peaches in the refrigerator as compared to apples?
Options:
(A) 2
(B) 8
(C) 7
(D) 6
(E) 4
answer: Stream of consciousness: (Apples + Oranges) - (Oranges + Peaches) = 7
Apples - Peaches = 7 The answer is (C).

question: The H.C.F. of two numbers is 11 and their L.C.M. is 7700. If one of the numbers is 275, then the other is:
Options:
(A) 279
(B) 283
(C) 308
(D) 318
(E) 328
answer:
Stream of consciousness: Other number = (11 x 7700)/275 = 308. The answer is (C).