When taking an IQ test, the set of numbers given is:
17, 12, 108, 9.
You are supposed to work out which number does not fit. I have earmarked 17 as the incorrect number for two different reasons: it's the only number not divisible by 3, and it's the only number not divisible by another number in the sequence (i.e. 108÷12=9) - but the test keeps saying that's not the correct answer.
Please help me determine which number does not fit, and why.