question:Which of these numbers is different from the others?
Options:
(A) 678
(B) 690
(C) 696
(D) 702
(E) 708
answer:(D)
Stream of consciousness:All of the numbers are multiples of 6. 702 is the only number that is also a multiple of 9.

question:Which of the options is a two-digit number, which has a unit's digit that exceeds its ten's digit by 4 and the product of the given number and the sum of its digits is equal to 208.
Options:
(A) 15
(B) 37
(C) 55
(D) 26
(E) 73
answer:(D)
Stream of consciousness:Using the elimination method the option that fits this description is 26
6-2 = 4 (unit's digit that exceeds its ten's digit by 3)
26*8 = 208 (the product of the given number and the sum of its digits is equal to 175)

question:80 370 860 ? 2440 3530
Options:
(A) 900
(B) 840
(C) 750
(D) 860
(E) 1550
answer:
(E)
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.