question: 80 370 860 1550 2440 ?
Options:
(A) 900
(B) 840
(C) 750
(D) 860
(E) 3530
answer: Stream of consciousness: 10^2 - 20 = 80
20^2 - 30 = 370
30^2 - 40 = 860
40^2 - 50 = 1550
50^2 - 60 = 2440
60^2 - 70 = 3530. The answer is (E).


q: What will come in place of the x in the following Number series? 49920, 4160, 416, x
Options:
(A) 52
(B) 3
(C) 4
(D) 5
(E) 6
a: Stream of consciousness: 49920 /12 = 4160
3840 /10 = 416
416 /8 = 52 The answer is (A).


question: Find the odd man out
1, 3, 7, 11, 15, 18, 21
Options:
(A) 3
(B) 7
(C) 18
(D) 21
(E) 1
answer: Stream of consciousness: The 18 is the only even number in the series. The answer is (C).


q: A train 490 m long, running with a speed of 63 km/hr will pass a tree in?
Options:
(A) 15 sec
(B) 16 sec
(C) 28 sec
(D) 20 sec
(E) 25 sec
a: Stream of consciousness: Speed = 63 * 5/18 = 35/2 m/sec
Time taken = 490 * 2/35 = 28 se The answer is (C).


question: The average of six results is 15 and that of the first five is 13. The sixth result is?
Options:
(A) 20
(B) 25
(C) 15
(D) 22
(E) 18
answer: Stream of consciousness: 6 * 15 â€“ 5 * 13 = 25 The answer is (B).


question: In how many years does a sum of Rs. 5000 yield a simple interest of Rs. 16500 at 15% p.a.?
Options:
(A) 22
(B) 20
(C) 25
(D) 30
(E) 35
answer:

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: T = (100 * 16500)/(15 * 5000) = 22 years The answer is (A).