T4W7 TS Q05 – Selective High School

Mr Norris held a five-question quiz for five of his students. No student got all five incorrect, and no one received identical scores.

Nelly got fewer questions right than Xavier but finished the quiz before him.
Howard got three incorrect answers but finished the quiz faster than Xavier.
Keanu wasn’t as fast as Nelly, but Nelly was not as fast as Howard.
Andrew had four questions incorrect but was the fastest.

If all of the statements above are true, which statement cannot be true?

Howard did not complete the quiz first. Keanu was slower than Howard. Andrew ended up with a higher score than Xavier. Howard ended up making more mistakes than Xavier.

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If all of the statements above are true, which statement cannot be true?