A 70 cm long wire is to be cut into two pieces so that one piece will be 2/5th of the other, how many centimeters will the shorter piece be?
Options:
(A) 21
(B) 20
(C) 17
(D) 12
(E) 18

1: 2/5 = 5: 2
2/7 * 70 = 20 So the answer is: (B).

The floor of a rectangular room is 19 m long and 12 m wide. The room is surrounded by a veranda of width 2 m on all its sides. The area of the veranda is :
Options:
(A) 144 m2
(B) 140 m2
(C) 108 m2
(D) 158 m2
(E) None of these

Area of the outer rectangle = 23 Ã— 16 = 368 m2
Area of the inner rectangle = 19 Ã— 12 = 228 m2
Required area = (368 â€“ 228) = 140 m2 So the answer is: (B).

The length E 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%

Let the length E 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 So the answer is: (D).

In how many different ways can the letters of the word ‘PREPTY’ be arranged?
Options:
(A) 230
(B) 240
(C) 260
(D) 280
(E) 360

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Number of ways = 61/21 6X5X4X3X2X1 - 360 So the answer is: (E).