Question: What will come in place of the x in the following number series? 12, 26, 54, 110, 222, x
Options:
(A) 444
(B) 446
(C) 448
(D) 452
(E) 454
Answer: 12
12 2 + 2 = 26
26 2 + 2 = 54
54 2 + 2 = 110
110 2 + 2 = 222
222 2 + 2 = 446
The answer is (B).

Question: 1500 is increased by 20%. Find the final number.
Options:
(A) 1500
(B) 1800.
(C) 1900
(D) 1700
(E) 1660
Answer: Final number = Initial number + 20%(original number) = 1500 + 20%(1500) = 1500 + 300 = 1800.
The answer is (B).

Question: A car has a 20-gallon fuel to travel 500 miles.At this rate, how many gallons of fuel are needed for a 1000 mile car ?
Options:
(A) 10
(B) 30
(C) 20
(D) 40
(E) 50
Answer: Number of gallons of fuel per mile = 500 /20 = 25 gallons per mile
Number of gallons of fuel for a 1000 mile car = 1000/25 = 40
The answer is (D).

Question: A boy runs 200 metres in 24 seconds. What is his speed?
Options:
(A) 20 km/hr
(B) 24 km/hr
(C) 30 km/hr
(D) 32 km/hr
(E) 34 km/hr
Answer:
200/24 * 18/5 = 30 km/hr
The answer is (C).