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 ...

This is a straightforward vocabulary test, so if you've ever taken the SATs, this will feel totally familiar. Take the quiz here. It's highly unlikely you'll ever need to write something without spell ...

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This piece originally appeared on The Conversation. 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.

Do you think you have sharp eyes? Try this optical illusion IQ test and spot the hidden needle without getting distracted by the tortoise-and-rabbit race. Only 25 seconds to check how strong your ...

Visual illusions play tricks with the human brain and test your attentiveness. In today’s visual illusion IQ test, the ...

These quizzes won't give you an exact IQ number, but they will tell you how smart you are by testing your expertise in various subjects. These quizzes are deceptively tricky, so make sure you put your ...

Daphne Martschenko does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...