Evaluating Mathematical Statements
XAT 2013 · Quantitative Ability & Data Interpretation · Hard · Number Theory
Please read the following sentences carefully: I — 103 and 7 are the only prime factors of 1000027 II — III — If I travel one half of my journey at an average speed of x km/h, it will be impossible for me to attain an average speed of 2x km/h for the entire journey.
- A.
All the statements are correct
- B.
Only Statement II is correct
- C.
Only Statement III is correct
- D.
Both statements I and II are correct
- E.
Both statements I and III are correct
C
Explanation
Statement I: , so 19 is also a prime factor (False). Statement II: Raising to power 42 gives , which is False (). Statement III: Average speed . For , , impossible. Thus Statement III is True.
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