The mentalfloss.com Brain Game. Free-for-all Friday. Have at it!

Here's an alphabetical list of five words:

BLACKED, PACKAGE, POLLACK, SLACKED, TACKIER

Which one of the following four words
best fits in with the above group, and why?

BACKLOG, CRACKLE, CUTBACK, QUACKED

Here is the ANSWER.

THE ANSWER:

BACKLOG.

Each of the five words still form a word when the letter sequence "ACK" is removed.

BLACKED - ACK = BLED
PACKAGE - ACK = PAGE
POLLACK - ACK = POLL
SLACKED - ACK = SLED
TACKIER - ACK = TIER.

The only answer that matches this is BACKLOG - ACK = BLOG.

NOTE: These types of puzzles sometimes lend themselves to alternate answers. If you have one that you believe should be considered correct, feel free to add it to the comments below. Thanks for playing, and have a great weekend!