68 May 2026

), a regular 68-sided polygon is considered constructible using only a compass and straightedge. 68 in Culture and Daily Life

In restaurant slang, "68" is the opposite of "86" (which means to remove an item from the menu). A "68" means an item is back on the menu or available. ), a regular 68-sided polygon is considered constructible

, 68 is the very last two-digit number to appear for the first time. , 68 is the very last two-digit number

On an infinite chessboard, there are 68 distinct squares that are exactly three knight's moves away from any starting square. The Last Two-Digit "First" Number: In the digits of )

68 is a "happy number," meaning that if you take the sum of the squares of its digits and continue the process, you eventually reach 1. The Last Two-Digit "First" Number: In the digits of

). Many mathematicians believe it is the last even number to have this exact property before higher numbers begin having three or more pairs. Because of its factorization (