Brain teasers are not only supposed to entertain us, but they can also improve our intellectual health. However, a sharp eye, good mathematical skills, and attention to detail are all important to crack their codes, and few people can solve them at first. Bright Side has brought you some of the most difficult challenges that will test your brainpower. Are you ready?

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Do Brain's Yoga by solving Printable Puzzles like Picture Puzzles, Maths Riddles, Logical Brain Teasers, Rebus, Sudoku Puzzles and Brain IQ Tests.

Fact Republic is where curiosity meets clarity. Discover random, history, and uncommon facts about everyday life. Uncover the unbelievable and unknown

Good communication skills include the art and science of asking the right questions. This article explains the difference between open questions, closed questions, factual, and leading questions. Learn where and how to use them in different circumstances to achieve the results you want.

Where is it? This test will check your vision, memory and brain! Are you ready?

50+ IQ test sample questions and answers for free. It has easy, hard, math and high included

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Take this Free Online Trivia Quiz on Quiz Club! "The true sign of intelligence is not knowledge but imagination."

Using visual brainteasers in the classroom encourages critical thinking in your students - plus kids love them!