Question

Measure the paper clip to the nearest 1/8 inch.

A. 1 2/8 inches

B. 1 1/2 inches

C. 1 4/8 inches

D. 1 3/8 inches

Answer 1

1 3/8 D

Explanation:

The first and most obvious part of the answer is that the paper clip is at least 1 inch long. The question is how much longer?

It is between 1/4 of an inch and 1/2 of an inch. In fact it is exactly half way between them.

So that resembles an average.

(1/4 + 1/2)/2 = (1/4 + 2/4) / 2 = (3/4)/2

`((3)/(4) )/(2) = ((3)/(4) )/((2)/(1) )`

Now the trick is to invert the denominator (make it 1/2) and multiply

3/4 * 1/2 = 3/8