Cuemath, a student-friendly mathematics and coding platform, conducts regular Online Live Classes for academics and skill-development, and their Mental Math App, on both iOS and Android , is a one-stop solution for kids to develop multiple skills. Understand the Cuemath Fee structure and sign up for a free trial. Start by thinking of a number, any number. Now, multiply that number by 9.
If the result is a multi-digit number, add its digits together to come up with a new number. If that new number is still a multi-digit number, add its digits together to come up with yet another new number. The mystery is this: first, take any three digit number, where the first and last digits differ by two or more and reverse the number to produce a new one. Then subtract the smaller from the larger producing another new number.
If you reverse this number and this time add the two, the result will always be Math Magic Tricks. Table of Contents 1.
Introduction 2. Here are some math magic tricks to wow your children - 3. Conclusion 4. Here is how this mental magic trick is done Ask a member of the audience to think of a four digit number in which all of the digits are different. Tell them to write the number down but not to tell you what it is — see a in the demonstration below Get them to jumble up the four digits and write the new number below the first b if it is smaller or above the first number if it is larger.
Now ask them to subtract the smaller number from the larger number c Next get them to add the digits of the total together d. All you need is your mental powers.
Tell your friend to double the new number. Have her take the last number she had, and multiply it by 2. Have her add 4 more. Put your hands to your head and concentrate, then tell her to add 4 to her last answer. Divide by 2. Tell her you almost have it, but the number is too big for you to see. Ask her to divide it by 2 to make it easier. Subtract the original number.
Ask your friend to look at the piece of paper she used to remind herself what the original number was. Take the last answer she had and subtract that original number. Show her your prediction. Tell her you've finally read her mind. Ask her to announce the last number she ended up with. Once she has, unfold your piece of paper and reveal the 3 you wrote down. No matter which number she started with, her answer will be 3. Method 2. Tell someone you're going to find his age. Let him know you'll be using your mathematical mind-reading abilities.
Give him a calculator if he doesn't want to do the calculations in his head. This trick won't be too impressive with close friends or classmates, since you probably already know their age. Pick someone at least 10 years old and no more than 99 years old.
Ask him to multiply the first digit in his age by five. Remind him to do the math silently, to keep his age secret from you. For example, if he is 32 years old, he should take the 3 and multiply it by 5. Add 4 to his answer. Tell him to add 4 to the answer he found. Tell him to double his answer. Now your subject should multiply his last answer by 2, and let you know when he's finished. If he's doing the math in his head, ask him "Are you sure?
Have him add the second digit of his age. Next, the person you're "mind reading" adds the last number in his age. Tell him this is the last calculation he needs to do. Since the subject of our example is 32 years old, he would add 2 to his last answer. Ask for his last answer. Have him say the final number out loud, so you and everyone in the room can hear it.
Subtract 8 and tell him his real age. Silently subtract 8 from the number he gave you. Once they've generated many wrong ideas, I give them the hint that the secret has something to do with the top lefthand corner number on each card. Because they've had time to create a chart that shows secret number vs. If not, I keep giving "hints" until we're able to discover how it works as a class. Once we've all discovered how it works, I always give each student their own set of the cards so that they can practice it themselves this will undoubtedly be their favorite part.
I tell them to show their magic trick to their friends in other classes, their family members, their neighbors, etc. It's a great way for them to practice mental addition calculations through Did your students enjoy learning this magic math trick?
We'd LOVE it if you'd share one of these images on social or leave a comment in the space below! Math Magic Trick. Mar 10 Written By Brittney Field.
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