All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info

Home > Numbers
Mental Arithmetic (Posted on 2003-10-05) Difficulty: 3 of 5
I can multiply any three-digit number by 1667 in my head, usually in less than 10 seconds.

Also, to make it even more impressive, I come up with the digits of the result in proper order (not in reverse!)

How can I do this?

See The Solution Submitted by nellie    
Rating: 3.3333 (6 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
a solution?mohan2003-10-16 01:17:00
re: gamer's replyGamer2003-10-15 19:51:52
gamer's replynellie2003-10-15 13:23:50
re: Mental ArithmeticGamer2003-10-14 17:23:54
Mental Arithmeticnellie2003-10-14 06:33:32
re: nonemohan2003-10-14 03:25:01
noneLee2003-10-13 12:26:47
Solutionsolutionmohan2003-10-13 04:45:20
Some ThoughtsNo Subjectmohan2003-10-13 04:42:39
re(2): solutionnellie2003-10-12 11:26:22
re: solutionmohan2003-10-06 01:42:22
a possible solution?mohan2003-10-06 01:32:25
Solutionre: another path?Gamer2003-10-05 14:57:13
re. another path?Lee2003-10-05 14:54:06
Some Thoughtsanother path?Charlie2003-10-05 14:36:43
alsoLee2003-10-05 14:23:41
solutionLee2003-10-05 14:09:50
SolutionsolutionRoyCook2003-10-05 12:58:01
Another ClarificationGamer2003-10-05 12:27:18
clarificationCharlie2003-10-05 11:22:39
Please log in:
Login:
Password:
Remember me:
Sign up! | Forgot password


Search:
Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (2)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:
Copyright © 2002 - 2017 by Animus Pactum Consulting. All rights reserved. Privacy Information