Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

Pages: **1**

**caitty90****Member**- Registered: 2006-02-25
- Posts: 2

K well the only way i can figure out this problem is that even though the 9's would go on for an infinity you must take in consideration that if it ever stopped that when multiplyin by 10 you are moving the decimal backwards, therefore takin away 1 of the nines in the sum. The sum ends up workin out as long as you take into consideration that there must be an end.

caitlin

Offline

**caitty90****Member**- Registered: 2006-02-25
- Posts: 2

is it true

Offline

**ryos****Member**- Registered: 2005-08-04
- Posts: 394

Some things really do go on forever, however unprepared our finite minds are to deal with that.

El que pega primero pega dos veces.

Offline

**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,659

You are talking about 0.999... = 1, is that right?

The problem with infinity is that it is not really a "big, big, big number" - it is a concept of going on **forever**.

When we say 1/3 = 0.333... we are saying "one third *equals* zero point 3 repeating forever".

By the way 3 × (1/3) = 3 × 0.333... = 1

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman

Offline

**krassi_holmz****Real Member**- Registered: 2005-12-02
- Posts: 1,905

Every number has 2 types:

2.00000=1.(9)

3.14=3.13(9)

But if the number is like Pi it hasn't.

IPBLE: Increasing Performance By Lowering Expectations.

Offline

Pages: **1**