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: Two trains, each 100 m long, moving in opposite directions, cross other in 6 sec. If one is moving twice as fast the other, then the speed of the faster train is?

 Option A: 80 km/hr

 Option B: 66 km/hr

 Option C: 60 km/hr

 Option D: 67 km/hr

 Option E: 22 km/hr

A: Option A
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Q: Question: If a light flashes every 6 seconds, how many times will it flash in 1/4 of an hour?

 Option A: 51

 Option B: 151

 Option C: 251

 Option D: 351

 Option E: 451

A: Option B
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Q: Question: There are two positive numbers in the ratio 5 : 8. If the larger number exceeds the smaller by 15, then find the smaller number?

 Option A: 25

 Option B: 24

 Option C: 28

 Option D: 88

 Option E: 99

A:
Option A
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