tens and ones

• October 23rd 2006, 12:41 PM
mredhi390
tens and ones
My tens digit is 3 more than 5.My tens digit is double the number of my ones digit.What number am I?
• October 23rd 2006, 12:46 PM
CaptainBlack
Quote:

Originally Posted by mredhi390
My tens digit is 3 more than 5.

So the tens digit is 5+3=8

Quote:

My tens digit is double the number of my ones digit.What number am I?
So the ones digit is 8/2=4.

The number is 84

RonL
• October 23rd 2006, 12:48 PM
topsquark
Quote:

Originally Posted by mredhi390
My tens digit is 3 more than 5.My tens digit is double the number of my ones digit.What number am I?

I'm assuming a two digit number?

Let it be $ab = a \cdot 10 + b$.

We know that a is 3 more than 5, so a = 8.

a is double b, so a = 2b. Since a = 8, thus b = 4.

So the number is 84.

-Dan
• November 7th 2007, 10:38 AM
erica
my ones digit is 2 less than 8. my ones digit is 4 more than my tens digit. what number am i
• November 7th 2007, 11:05 AM
topsquark
Quote:

Originally Posted by erica
my ones digit is 2 less than 8. my ones digit is 4 more than my tens digit. what number am i

Well, 8 - 2 = 6, so that's the one's digit. 6 - 4 = 2, so that's the ten's digit. Your number is 26.

-Dan
• November 29th 2007, 01:13 PM
ivananeedshelponmath2
i know that one
Quote:

Originally Posted by mredhi390
My tens digit is 3 more than 5.My tens digit is double the number of my ones digit.What number am I?