Ikki's hobbies include playing darts, billiards, and table tennis, as well as solving Kent's math puzzles.

His interest include devising math puzzles and observing things; as such, he likes every animal because he enjoys observing them.

The user must solve a math puzzle in order to open it.

The sleuth must enter each room of the studio to gather clues, which are provided upon the completion of math puzzles.

By his account, Mr. Gardner then rushed out to secondhand bookstores to find books about math puzzles, an approach he used for years to keep just ahead of his monthly deadline.

During the first two seasons of the show, he presented a weekly contest segment emphasizing math puzzles.

To obtain the pattern for each room, the player must visit each room and solve a math puzzle related to that room.

(To one special agent, the crux of the matter reduces to an infernal "math puzzle.")

The Science edition (Math outside of Japan) deals with numbers and math puzzles.

Kris and Greg were presented with a math puzzle to get their combination, which they successfully solved, with the answer 1100, to win $1,000.