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A girl counted in the following way on the fingers of her left hand : She started by calling the thumb 1, the index finger 2, middle finger 3, ring finger 4, little finger 5 and then reversed direction calling the ring finger 6, middle finger 7 and so on. She counted upto 1994. She ended counting on which finger?

Correct Answer: Index finger

Explanation:

Clearly, while counting, the numbers associated to the thumb will be : 1, 9,17, 25,.....


i.e. numbers of the form (8n + 1).


Since 1994 = 249 x 8 + 2, so 1993 shall correspond to the thumb and 1994 to the index finger.


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