www.cancan.ro/test-de-inteligenta-4-1-31-este-gres

A new intelligence test challenges individuals to correct a mathematical equation by moving a single matchstick. The equation presented is 4 + 1 = 31, which can be corrected by repositioning a matchstick from the plus sign to create 4 - 1 = 3 / 1, thus making it valid. IQ levels are categorized based on test results, with scores above 140 indicating genius-level intelligence. The article emphasizes the importance of attention and concentration in solving such puzzles, often used by psychologists to assess cognitive abilities.