John, 12-years-old, is three times as old as his brother. How old will John be when he is twice as old as his brother?
Two families go bowling. While they are bowling, they order a pizza for £12, six sodas for £1.25 each, and two large buckets of popcorn for £10.86 [each]. If they are going to split the bill between the families, how much does each family owe?
4, 9, 16, 25, 36, ?, 64. What number is missing from the sequence?
These are questions from online Intelligence Quotient or IQ tests. Tests that purport to measure your intelligence can be verbal, meaning written, or non-verbal, focusing on abstract reasoning independent of reading and writing skills. First created more than a century ago, the tests are still widely used today to measure an individual’s mental agility and ability.
Education systems use IQ tests to help identify children for special education and gifted education programmes and to offer extra support. Researchers across the social and hard sciences study IQ test results also looking at everything from their relation to genetics, socio-economic status, academic achievement, and race.