Test IQ cu chibrituri | Mutând un singur băț, transformați 9-1=4 într-o egalitate corectă

CANCAN presents an IQ test involving a matchstick puzzle where participants must correct the equation 9 - 1 = 4 by moving one matchstick. The solution involves changing the minus sign to a plus sign, transforming the equation into 3 + 1 = 4. IQ levels are categorized based on test results, with scores above 140 indicating exceptional cognitive abilities. Intelligence tests assess various cognitive skills, but puzzles like this focus on logical reasoning and attention. They serve as a fun challenge rather than a definitive measure of intelligence.