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

You are not logged in.

#1 2011-02-14 22:39:31

anky16
Novice

Offline

how do i find a four digit whole number whose square has last four digits same as the number itself. please suggest a rational solution to it.

#2 2011-02-14 23:44:11

bobbym

Online

Hi anky16;

There is only one solution.

Welcome to the forum!

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

#3 2011-02-15 01:50:59

gAr
Star Member

Offline

Hi anky16,

Answer and logic is same as bobbym's.
If you want to use equations:

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

#4 2011-02-15 05:34:48

bob bundy
Moderator

Offline

hi  gAr

Neat solution!

Bob

You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

#5 2011-02-15 13:33:37

gAr
Star Member

Offline

Hi bob,

Thanks

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

#6 2011-04-20 22:59:40

alexa.pete9
Member

Offline

Decimal numbers such as 3.762 are used in situations which call for more precision than whole numbers provide. As with whole numbers, a digit in a decimal number has a value which depends on the place of the digit. The places to the left of the decimal point are ones, tens, hundreds, and so on, just as with whole numbers.

#7 2011-04-20 23:03:46

bobbym

Online

Hi;

alexa.pete9 wrote:

Decimal numbers such as 3.762 are used in situations which call for more precision than whole numbers provide.

That is not correct. 3.762 is not more precise than the whole number 3. The whole number or integer is exact and implies no error. 3.762 is more precise than the decimal 3.

When you do a calculation with integers such as 7 * 5 = 35, this is exact. (22 / 7 ) ( 67 / 6 ) = 35.095238 is not exact. It implies an error of ± .0000005

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

plutoman
Member

Offline