Need help with math pattern.

Forum: Technology
Author: [Technology] Topic: Need help with math pattern.
football_007 PM football_007
Joined: Jan 2008
Posts: 24518
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Posted: 8/23/2012 1:15:46 AM
I don't know where to post it. I try to help my son on his homework, but his teacher said the answers are wrong. I am confuse...help

Here are the patterns # 1:
1, 2, 3, 5, 8, 13, 21, ?, ?, ?

The next 3 numbers are 34, 55, and 89. 

And here are the pattern #2 :
2, 4, 9, 16, 25, ?, ?, ?

The next 3 numbers are 36, 49, and 64.

My son told me that the answers are all wrong. What did I miss ? Why is it wrong ?

Please help. Thanks 

depeche2 PM depeche2
Joined: Feb 2002
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Posted: 8/28/2012 9:55:14 AM
#1 clearly you're right. Looks like you're just adding the prior 2 numbers.

#2 I'm stumped.  Looks like you're adding 2 more each time.  I don't see that pattern given that it starts with 2,4,9.
lbcake PM lbcake
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Posted: 9/3/2012 6:48:39 PM
1.  1+2 = 3   3+5 = 8   8+13 = 21  and so on

2. The first number in the sequence should be 1. In other words, 1,4,9,16,25,36 etc

Square each number. 1squared = 1, 2 squared = 4, 3 3quared = 9, 4 squared = 16 and so on.
KktdocT PM KktdocT
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Posted: 9/7/2012 11:12:35 AM
You're better at gambling and fading prosects, football_007.
lbcake is correct.


HotRod11 PM HotRod11
Joined: Sep 2012
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Wisconsin
 
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Posted: 9/15/2012 4:12:49 AM
look up avogadros's number on wikipedia, therein lies all your answers
searchwarrant PM searchwarrant
Joined: May 2003
Posts: 65977
California
 
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Posted: 9/17/2012 2:05:47 AM

http://www.khanacademy.org/

Solved.

Forum: Technology
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