Number tricks and Math

Although some children might be reluctant to believe it, math can be fun! There are many number tricks that seem unusual, but are actually fun and surprising! For example, you can figure out someone’s exact age by asking them to choose a number between 2 and 9. Here are the steps!

Steps:

1. Choose a number between 2 and 9
2. Multiply your number by 2
4. Multiply the number by 50
6. Subtract the year you were born from the number ( you should now have a three digit number)
7. The first digit should be the number you chose, and the next two digits should be your age

There are many other fun tricks like this. Next time you want to trick you child, try this fun math trick! This guy teaches how to do this trick with playing cards: http://www.youtube.com/watch?v=WhH8WMbxPEU.

You can also do more fun tricks with your child through this website http://www.cybraryman.com/numbertricks.html.

These fun number games are not only fun and engaging, but also a  good way for your child to practice his or her math skills

Learn more about Math Tutoring and Mathnasium of Palo Alto-Menlo Park (and find more fun problems) —  http://www.mathnasium.com/paloalto-menlopark

Numbers in Nature! – The Golden Ratio

This continuation of our previous article “Numbers in Nature! – The Fibonacci Sequence” will cover another miraculous and seemingly arbitrary pattern that appears everywhere, even in ourselves. We are going to cover the Golden Ratio.

The Golden Ratio = 1 : 1.618

Φ = 1.618034…

Looks complicated, doesn’t it? In fact, the idea is quite simple.

The Golden Ratio was discovered millenia ago in Ancient Greece, and has been found in nature and used in art for centuries since.

The ancient Greeks noticed when they measured a specific length (say, the distance from your shoulder to your elbow) and you multiplied it by approximately 1.618, you got remarkably accurate figure for a related length (say, the length of the entire arm). This may seem like a coincidence, but it kept coming up again and again.

Looking at the length of our fingers, each section — from the tip of the base to the wrist — is larger than the preceding one by roughly the Golden Ratio.

Flowers? Golden Ratio.

Pine cones? Golden Ratio.

Fight Patterns? DNA? The human face?

Golden Ratio.

Golden Ratio.

GOLDEN. RATIO.

Whether you live in Palo Alto or Redwood City, Menlo Park or Atherton, you can make these observations by yourself! Start with your body and go into your back yard. You’ll be amazed at the patterns you find!