q: 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
a: OK... Number of ways = 61/21 6X5X4X3X2X1 - 360
The answer is (E).

q: A person spends 40% of his salary on food, 25% on house rent, 15% on entertainment and 5% on conveyance. If his savings at the end of the month is Rs. 3000, then his salary per month in rupees is:
Options:
(A) 20000
(B) 6000
(C) 8000
(D) 10000
(E) None of these
a: OK... Total expenditure = 40 + 25 + 15 + 5 = 85%
Saving = (100 - 85) = 15%
15/100 Salary = 3000, Salary = 20000 Rs.
The answer is (A).

q: The speed of a boat in still water is 60kmph and the speed of the current is 30kmph. Find the speed downstream and upstream?
Options:
(A) kmph
(B) kmph
(C) kmph
(D) kmph
(E) kmph
a:
OK... Speed downstream = 60 + 30 = 90 kmph
Speed upstream = 60 - 30 = 30 kmph
The answer is (D).