Q: The simple interest on a sum of money is 4/9 of the principal and the number of years is equal to the rate percent. Find the rate and the time?
Options:
(A) 6 2/3%
(B) 6 2/8%
(C) 7 2/3%
(D) 6 5/3%
(E) 4 2/3%
A: OK... Stream of consciousness: 4/9 P = (P*R*R)/100
R = 20/3 = 6 2/3%
The answer is (A).

Q: a certain organization has three committees. only two persons are members of all committees, but every pair of committees have three members in common. what is the least possible no of member of members on any one committee?
Options:
(A) 4
(B) 5
(C) 6
(D) 7
(E) 8
A: OK... Stream of consciousness: Total 4 members minimum required to serve only on one committee.
The answer is (A).

Q: How much 60% of 50 is greater than 40% of 30?
Options:
(A) 18
(B) 28
(C) 29
(D) 11
(E) 12
A: OK... Stream of consciousness: (60/100) * 50 (40/100) * 30
30 - 12 = 18
The answer is (A).

Q: Find the odd man out.10, 25, 45, 50, 66, 70, 80
Options:
(A) 45
(B) 50
(C) 66
(D) 70
(E) 80
A:
OK... Stream of consciousness: Each of the numbers except 66 is multiple of 5.
The answer is (C).