Boost Your Brain Power With IQ Quizzes You know that you need to exercise your body to be healthy. But exercises for your brain are also very important. Here, you can quiz your brain daily for free to …

On MathAndMind, you can solve math problems on four basic operations arranged by difficulty — the higher your level, the harder the problems. The ascending order of difficulty aims at gradually …

If you can pass this math test without a calculator, you’re smarter than 90% of people. Just 10 quick math problems – and you not only know how smart you actually are but also have your brain fitter. …

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These 10-question tests allow you to measure your math intelligence. They determine your capacity for reasoning, evaluate the range of your overall intelligence, and compare your score with the average …

If you can pass this math test without a calculator, you’re smarter than 90% of people. Just 10 quick math problems – and you not only know how smart you actually are but also have your brain fitter. …

Moving at the speed of 60 mph, the family will make 120 miles before the first park, then another 120 before the second one, and then, in another hour, they will make 60 miles, covering a total distance …

The radical symbol represents the positive square root. Every positive number has a positive square root and a negative square root. To find the square root of a given number, figure out which number …

The minute hand is pointing directly at 3. The hour hand is 1/4 of the way between 3 and 4. Since there are 12 numbers, the angle between each number is 30 degrees. The angle between the hands is 30 …

In mathematics, a Harshad number (or Niven number) in a given number base is an integer that is divisible by the sum of its digits when written in that base.