[Ans] (D)
[Question] The length Q of a rectangle is decreased by 15% and its width is increased by 40%. Does the area of the rectangle decrease or increase and by what percent?
Options:
(A) Decreases by 19%
(B) Decreases by 25%
(C) Increases by 6%
(D) Increases by 19%
(E) Increases by 25%
[CoT] Let the length Q of the rectangle be 100x, and width be 100y. Area = 100x * 100y = 10000xy
Now after the change Length = 85x, and width = 140 y. Area = 11900xy
% Change = (11900xy - 10000xy)/(10000xy) = 19 % Increase. Hence

[Ans] (A)
[Question] A board 7ft. 9 inches long is divided into 3 equal parts . What is the length of each part?
Options:
(A) 31 inches
(B) 32 inches
(C) 33 inches
(D) 34 inches
(E) 35 inches
[CoT] 7 ft 9 in is 84 + 9 = 93 inches. so 93/3 = 31 inches or 2 ft. 7 inch.

[Ans] (E)
[Question]
The price of a T.V. set worth Rs. 40000 is to be paid in 20 installments of Rs. 1000 each. If the rate of interest be 6% per annum, and the first installment be paid at the time of purchase, then the value of the last installment covering the interest as well will be?
Options:
(A) 22678
(B) 26699
(C) 26788
(D) 19000
(E) 39000
[CoT] Money paid in cash = Rs. 1000
Balance payment = (40000 - 1000) = Rs. 39000