95 white and black tiles will be used to form a 10x10 square pattern. If there must be at least one black tile in every row and at least one white tile in every column, what is the maximum difference between the number of black and white tiles that can be used?
Options:
(A) 75
(B) 80
(C) 85
(D) 90
(E) 95
Answer and stream of consciousness: (C)
Stream of consciousness: Answer = C
Please refer diagram below
95 - 10 = 85


How much is 80% of 40 is greater than 4/5 of 25?
Options:
(A) 22
(B) 67
(C) 88
(D) 12
(E) 66
Answer and stream of consciousness: (D)
Stream of consciousness: (80/100) * 40 – (4/5) * 25
32 - 20 = 12


A no.when divided by 142 gives a remainder 110, what remainder will be obtainedby dividingthe same no.14?
Options:
(A) 16
(B) 17
(C) 18
(D) 19
(E) 20
Answer and stream of consciousness: (C)
Stream of consciousness: 142 + 110 = 252/14 = 18 (Remainder)


At what rate percent on simple interest will a sum of money double itself in 30 years?
Options:
(A) 3 1/3%
(B) 3 1/8%
(C) 3 7/3%
(D) 3 1/7%
(E) 3 1/1%
Answer and stream of consciousness:

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
(A)
Stream of consciousness: P = (P*30*R)/100
R = 3 1/3%