in the integer 3,589 the digits are all different and increase from left toright. how many integers between 4, 000 and 5,000 have digits that are all different and that increase from left to right?
I really don't feel like listing all the numbers and count, so anyone has a simple and explainable method for this one?
thx a lot

2006-08-22 17:48:33 · 11 answers · asked by anime^_^lover@_@caseclosed 2 in Mathematics

0 ⤊

Why do so many people answer my riddle with the correct answer after seeing the answer to my riddle?

2006-08-22 17:48:29 · 4 answers · asked by ppellet 3 in Mathematics

3 ⤊

why is the gravitational field of an object dependent on the mass density rather than the mass of the object?

2006-08-22 17:47:03 · 7 answers · asked by CPCFC 1 in Astronomy & Space

0 ⤊

5.26x10 ^13 times 8.75x10^6?

2006-08-22 17:41:02 · 6 answers · asked by emily_miriam2002 1 in Mathematics

3 ⤊

Sigh. In base 2 what does 1+1 equal?

What were 2 of my last questions today?
Remarkable.

2006-08-22 17:39:23 · 14 answers · asked by ppellet 3 in Mathematics

0 ⤊

why do engineers need to know quantum physics?

like if you are doing HVAC you still have a basic knowledge of quantum mechanics.

2006-08-22 17:39:20 · 6 answers · asked by CPCFC 1 in Engineering

0 ⤊

will hydrochloric acid unclog a drain pipe for my sink.?

2006-08-22 17:34:57 · 11 answers · asked by kayemethan 1 in Chemistry

4 ⤊

How to enrich uranium?

2006-08-22 17:34:13 · 9 answers · asked by Abu Musayaf 1 in Physics

0 ⤊

uses of composite materials in industries.?

what are the uses

2006-08-22 17:33:42 · 2 answers · asked by HIpZeye 1 in Chemistry

0 ⤊

Is there a bottom to the univers every thing seam to be floating but what is realy deep under the univers?

2006-08-22 17:32:09 · 14 answers · asked by luie8luis 1 in Astronomy & Space

3 ⤊

how large is a nanoparticle?

how much smaller than WHAT is a nanoparticle? as opposed to other small objects, how much bigger is a nanoparticle than to the smallest known particle in universe? do nanoparticles have specific geometric shapes associated with what they are designed to do? are nanoparticles now used to cure health problems, and if so, how? did you read SPHERE by michael creighton? interesting book!

2006-08-22 17:31:44 · 9 answers · asked by Louiegirl_Chicago 5 in Other - Science

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