Today's mentalfloss.com Brain Game Tuesday Test Time is a tough one which asks you to identify the best number to continue a sequence. Are you up for the challenge?

89, 115, 22, 6, 737, 440, ___, ...

Which of the following numbers best
continues the above sequence, and why?

a. 18
b. 1252
c. 506
d. 3

Here is our SOLUTION. 

89, 115, 22, 6, 737, 440, ___, ...

Which of the following numbers best
continues the above series, and why?

a. 18
b. 1252
c. 506
d. 3

OUR SOLUTION:

b. 1,252.

When spelled out, every other number uses a hyphen:

eighty-nine
     one hundred fifteen
twenty-two
     six
seven hundred thirty-seven
     four hundred forty

one thousand two hundred fifty-two

Did you come up with an alternate answer? Feel free to share it (along with your explanation) in the comments below. Thanks for playing!