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Fill in the Missing Element

Here is a series of numbers:

16 06 68 88 ___ 98

What belongs in the blank spot?

87 is the common answer to this, but it has to be flipped upside down, so I consider L8 more correct.

If you flip the numbers horizontally by 180 degrees:

86 87 88 89 90 91

You see that the blank spot is 87, counting from 86 to 91. However, you need to flip it around, so it becomes L8.

Posted in Brain Teasers


2 Comments on "Fill in the Missing Element"

Ramon says
November 29, 2018 @ 07:24

The need to flip it back is a cool twist.

Joe Sixpack says
February 15, 2021 @ 15:57

Interesting. My answer was 68. Because the first number is 10 less than the second and the third number is 20 less than the fourth. So I assumed the 5th number would be 30 less than the sixth.

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