You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.

Q: Question: There is one highland where planes get fuel. A plan can cover the half of the world with full tank. A plane can transfer fuel from one plane to the other in the air. How many planes are required to make one plane cover the entire world once. Starting point of the travel is the Highland and coming back to the same Highland. All the other planes giving fuels to this Plane should also come back to the same highland and they don't have to cover the entire world.

Option A: 2

Option B: 3

Option C: 4

Option D: 5

Option E: 6

A: Option D
****
Q: Question: The distance between two cities A and B is 330 Km. A train starts from A at 8 a.m. and travel towards B at 60 km/hr. Another train starts from B at 9 a.m and travels towards A at 75 Km/hr. At what time do they meet?

Option A: 10 a.m

Option B: 10.30 a.m

Option C: 11 a.m

Option D: 11.30 a.m

Option E: None of these

A: Option C
****
Q: Question: Two numbers are respectively 35% and 50% more than a third number. The percentage that is first of the second is?

Option A: 90%

Option B: 47%

Option C: 38%

Option D: 52%

Option E: 83%

A:
Option A
****