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Fun Math Stuff Math Games Great fun with this math game that you can change for difficulty and Math Challenge . Practice your multiplications times tables with The Times Tables Game a fun game to learn and speed up your times tables knowledge. Practice your math skills and speed with Fast Math a fun speed math game. Practice Math Questions Addition and Subtraction One Digit Addition One Digit Subtraction Two Digit Addition Three Digit Addition Three Digit Subtraction Multiplication and Division One Digit Multiplication One Digit Division Two Digit Division Three Digit Multiplication Word Problems 1 and 2 Digit Word Problems     Fun Facts About Math 111,111,111 x 111,111,111 = 12,345,678,987,654,321 142857 is a cyclic number, this means the numbers always appear in the same order but rotated around when multipled by any number from 1 to 6. 142857 * 2 = 285714 142857 * 3 = 428571 142857 * 4 = 571428 142857 * 5 = 714285 142857 * 6 = 857142. 6 is the smallest perfect number. A perfect number is an integer such that the sum of its proper divisors is equal to the integer itself: 6 = 1 + 2 + 3. An easy way to square any 2 digit number that ends in 5. The last 2 digits of the answer will be 25, the preceding digits will be N*(N+1) where N is the first digit of the number. For example 25x25: 2(2+1)=6. So 25x25=625. National Pi Day is March 14, at 1:59. (3/14 1:59). Pick a number. Any integer will do. Now if the number is even, divide it by 2; if the number is odd then multiply it by 3 and add 1. No matter what number you start with you will eventually get to the same series of numbers: 4,2,1,4,2,1,4,2,1……. The only prime numbers that end in 2 or 5 are the numbers 2 and 5. Think of a positive number (keep it small so you can do the math in your head). Now do the following: 1. Square it. 2. Add the result to your original number. 3. Divide by your original number. 4. Add, oh I don't know, try 17. 5. Subtract your original number. 6. Divide by 6. Your answer will always be 3 regardless of the orginal number. To multiply by a 2-digit number by 11, all you have to is add the two digits and place the sum in between. Here are some examples: 32x11 = 352. See you add 3+2=5 and put the 5 between the 3 and the 2. Let's try another: 25X11=275. Back to Questions Study Page

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