q: Find the simple interest on Rs.350 for 10 months at 5 paisa per month?
Options:
(A) 277
(B) 175
(C) 288
(D) 266
(E) 121
a: Stream of consciousness: I = (350*10*5)/100 = 175 The answer is (B).


question: 137+276=435 how much is 731+672?
Options:
(A) 534
(B) 1403
(C) 1623
(D) 1513
(E) 1613
answer: Stream of consciousness: 137-731 and 276-672 similarly 435-534 The answer is (A).


q: Find the invalid no.from the following series 13, 18, 25, 30, 37, 40
Options:
(A) 13
(B) 18
(C) 40
(D) 37
(E) 25
a: Stream of consciousness: The differences between two successive terms from the beginning are 7, 5, 7, 5, 7, 5. So, 40 is wrong. The answer is (C).


question: The sticks of same length are used to form a triangle as shown below.If 87 such sticks are used then how many triangles can be formed?
Options:
(A) 43
(B) 44
(C) 45
(D) 465
(E) 47
answer: Stream of consciousness: First triangle is formed by using 3 sticks, but any subsequent triangle may be formed by using 2 sticks. Therefore, If 1st triangles uses 3 sticks, Remaining sticks = 87 - 3 = 84. With these 84, we can form 42 triangles. So total = 42 + 1 = 43 The answer is (A).


q: The speed of a boat in still water is 70kmph and the speed of the current is 20kmph. Find the speed downstream and upstream?
Options:
(A) 22 kmph
(B) 40 kmph
(C) 78 kmph
(D) 50 kmph
(E) 23 kmph
a: Stream of consciousness: Speed downstream = 70 + 20 = 90 kmph
Speed upstream = 70 - 20 = 50 kmph The answer is (D).


q: Find a a prime number from the options below.
Options:
(A) 69
(B) 70
(C) 71
(D) 72
(E) 74
a:

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
Stream of consciousness: Clearly, 71 is a prime number. The answer is (C).