The Book of IQ Tests

SynopsisJust how smart are you? Can you think abstractly? Decide which number comes next in a sequence? Figure out which drawing is the odd one out? Prove it and have fun at the same time when you take 25 brain-stumping IQ quizzes. Test yourself on this one: "The ability to exert effort for a purpose."Which of the following words best fits this definition:CAPABILITY, POTENTIAL, VIGOR, TALENT, POWER?