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Monthly Archive:: June 2016

Always Five (5)

< Find a calculator or a pencil and paper. Ask your friend (or everyone in the room) to choose any number. Example :43 Add the next highest number to it 43 + 44 = 87 Add 9 87 + 9 = 96 Divide by 2 96 / 2 = 48 Subtract your original number 48

Math Magic/Tricks

Math Magic/Tricks Trick 1: Number below 10 Step1: Think of a number below 10. Step2: Double the number you have thought. Step3:Add 6 with the getting result. Step4: Half the answer, that is divide it by 2. Step5: Take away the number you have thought from the answer, that is, subtract the answer from the

Card Trick =_4

Walk around the classroom and have students pick one card each from the deck. Ask them to be sure that no one sees their card. Have them perform the following mathematical operations: 1. Write the face value of the card that you selected on a piece of paper. The aces and face cards have the

Card trick =_3

Vikas MyAiM proposed the following problem: Say you are sitting in a dark room, where you are handed a deck of 52 cards. Ten of those cards have been turned facing up; the rest are facing down. Your job is to separate the cards into two stacks, each containing the same number of cards facing

Card trick =_2

Jim Steinmeyer is one of the nation’s most creative inventors of magic tricks. A few years ago he invented a marvelous mathematical trick. Known as the Steinmeyer nine-card trick, it has since been given many clever means of doing it by other magicians. Here is one of the simplest: Take any nine cards from a

Card trick =_1

Take a deck of cards facing up and count off from whatever the first card is until you say “king.” (for example, if a seven is the top card, you would say 7-8-9-10-J-Q-K). Take these cards and lay them face down and start over with another stack (In the example above, make certain that the

Your age by eating out!

Don’t tell me your age; you probably would tell a falsehood anyway — but your waiter may know! Here’s how to find your age using some Dining and Restaurant Math! 1. First of all, pick the number of times a week that you would like to go out to eat. (more than once but less

Twenty Objects Trick

1. Place 20 objects on the overhead. 2. Have a student remove any number of items from 1 to 10. 3. The items that remain will be a two-digit number. 4. Have a student find the sum of these two digits and remove that many more items from the projector. 5. Have a student give

The Dictionary Trick

This is my favorite trick. A student of mine from Herndon High School in Fairfax County, Virginia showed this to me in the late 1960s, and I used it nearly every year after that until I retired in 2006.Ask a student to pick a three digit number (where the first and last digits are different).

Phone Number Trick

1. Get a calculator. (You won’t be able to do this one in your head) 2. Key in the first three digits of your phone number (NOT the area code) 3. Multiply by 80 4. Add 1 5. Multiply by 250 6. Add the last 4 digits of your phone number 7. Add the last