Sample Question #267 (brainteaser)

Find the whole number that best completes the sequence below:

6,2 = 48,4 = 312,6 = 316,4 = ?

You have exactly one minute.

[Source: The Mensa Puzzle Calendar 2008]

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Sample Question #267 (brainteaser)

Find the whole number that best completes the sequence below:

6,2 = 48,4 = 312,6 = 316,4 = ?

You have exactly one minute.

[Source: The Mensa Puzzle Calendar 2008]

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ANSWER

Each line is A/B+1=C, so the answer is 5.

I agree. I thought of it slightly differently:

(A+B)/B = C, so the answer is 5. If you divide both numerator and denominator on the left hand side by B I arrive at your answer.

(A+B)/B=A/B+1. 🙂

BTW, this question may have seemed trivial, but it’s a good exercise for learning how to do a mathematical induction.

easy. answer is 5