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Scientific American presents Math Dude by Quick & Dirty Tips. Scientific American and Quick & Dirty Tips are both Macmillan companies. After all of the fun we’ve had recounting the tales of Knot Dude, ...

Also Read: Math Riddles: Find The Missing Numbers, Logic Math Puzzles Also Read: Math Riddles: Test Your Brain Power, Solve These Missing Numbers Puzzles Roopashree Sharma is a seasoned content ...

A prime number is a number with exactly two factors. Prime numbers are only divisible by 1 and itself. Another way to think of prime numbers is that they are only ever found as answers in their own ...

Struggling with mental math? Students from class 6 to 10 now have a clever way to simplify tricky multiplication problems. The “doubling square” method turns large or complex calculations into quick, ...

Sometimes you will have to substitute a number into an expression with a square number. Remember when a number is squared it is multiplied by itself. This is straightforward when you have a positive ...