It’s best to solve this week’s puzzle (really, three mini-puzzles) without an introduction. I’ll explain why after you’ve given it a shot. Did you miss last week’s puzzle? Check it out here, and find ...

Former President Donald Trump claimed to have again “aced” an increasingly difficult cognitive test involving intricate math problems, but experts say the test is easy, and a mock exam contained ...

Fewer than one in five people pass this IQ test, thought to be the shortest in the world at only three questions long. The Cognitive Reflection Test has a pass rate of just 17 per cent, leaving the ...