LA.lv offers quick math test: can you tell if a number is divisible by 3?

Latvian news portal LA.lv has published a light-hearted math quiz in its test section, evoking memories of school days. Readers are asked to determine whether specific numbers divide evenly by 3, with the quiz consisting of ten questions in total. The first question asks whether the number 51 is divisible by 3.

The trick behind it

According to the article's authors, no calculator or long division is needed to solve the task — knowing one simple trick is enough. The authors claim this method is remembered only by the sharpest-minded people, though the specific technique itself is not spelled out in detail within the article. It reportedly allows readers to quickly determine divisibility by 3 without performing a full division calculation.

Quiz format

The quiz is structured as an interactive test of speed and mental sharpness, with each question offering two answer options — "yes" or "no." In the introduction, the authors humorously recall the classic schoolchild complaint that math skills would never be useful in real life, inviting readers to prove otherwise by putting their skills to the test.

The piece is part of LA.lv's entertainment and quiz section, which regularly offers similar challenges to readers, including tests of knowledge, memory and logic. The article's lead image is credited to the free stock photo resource Unsplash.com.