q: Find the area of a parallelogram with base 24 cm and height 16 cm.
Options:
(A) 384 cm^2
(B) 200 cm^2
(C) 250 cm^2
(D) 350 cm^2
(E) 400 cm^2
a: OK... Area of a parallelogram = base * height = 24 * 16 = 384 cm2
The answer is (A).

q: When N is divided by 10 the remainder is 1 and when N is divided by 3 the remainder is 2. What is the remainder G when N is divided by 30?
Options:
(A) (a) 4
(B) (b) 7
(C) (c) 11
(D) (d) 13
(E) (e) 17
a: OK... N ends in the digit 1 because when N is divided by 10, the remainder is 1. Since N ends in 1, the remainder G when N is divided by 30 also ends in a 1. 11 is the only choice which ends in a 1.
The answer is (C).

q: Four of the following five parts numbered (a), (b), (c), (d) and (e) are exactly equal. The number of the part which is not equal to the other four parts is your answer.
Options:
(A) 85 17 110
(B) 45 6 + 75 4
(C) 175 25 75 + 5(2)
(D) 36 4 + 21(2) 7 5
(E) 65 12 46 5
a:
OK... Except it, others are equal to 550.
The answer is (B).