Question

The difference between the digits in a two-digit numeral is 3. The units' digit is twice the tens' digit. Find the numeral

Answer 1

do you know what difference between m and n means?

Answer 2

What

Answer 3

So you never heard of the word difference, right?

Answer 4

the difference between m and n means m-n

Answer 5

I have...but in this case I'm going to use 2*t (units digit) -t(tens digit)

Answer 6

pretend mn is a two-digit number
where m is the ten's digit and n is the one's digit
therefore mn can be written as 10m+n

anyways...
you are given the difference of m and n to be 3
so you have m-n=3 from the first sentence

Answer 7

The units' digit is twice the tens' digit.
do you know how to setup this equation style?

Answer 8

remember we let n be the units digit
and we let m be the ten's digit
so this is really saying
n is twice m

Answer 9

can you show me what that looks like as an equation

Answer 10

10m-2*10m

Answer 11

=3

Answer 12

?
I'm just asking you to write n is twice m as an equation

Answer 13

n=2m

Answer 14

perfect!

Answer 15

so we have the following two equations:
m-n=3
and
n=2m

Answer 16

and actually to avoid a negative tens digit cause it sorta doesn't make sense to me here
I'm going to say this instead you know since n is larger than m
n-m=3
n=2m

anyways we can plug the second equation into the first equation giving us
2m-m=3
can you solve for m?

Answer 17

2-1=1
so
2m-m=?

Answer 18

I know lol...but does that mean that you don't have to worry about multiplying the tens times ten

Answer 19

why are you doing that?

Answer 20

Because in the previous questions I was given here like 10m + n is the original. They are saying that 10*m is value of the tens digit

Answer 21

we are given the difference of the digits is 3
and that one digit is twice another

digits can only be 0,1,2,3,4,5,6,7,8,9
not more or less

Answer 22

m is the value of the 10 ten's digit
n is the value of the 1's digit

the value of the number is 10m+n

Answer 23

we haven't been giving the value of the number

Answer 24

we are only talking about the digits right now to find the number

Answer 25

example:
what can I say about the digits in 41

well I can say the ten's digit minus the one's digit is 3
and that the ten's digit is 4 times the one's digit

Answer 26

So if I wanted to make up a problem and get 41 as an answer:
It would go like this:

The difference between the digits in a two-digit number is 3.
The ten's digit is four times the one's digit.

So the equations would look like this:

Let mn be the number representation of what we are looking for where m is the ten's digit and n is the one's digit.

We are given m-n=3 and that m=4n

Pluggin the second equation into the first gives
4n-n=3
3n=3
so n=1

now since m=4n then m=4(1)=4

so mn=41

Answer 27

Ohhhhhhh

Answer 28

I see now

Answer 29

yea they are not talking about what value the digit holds
they are just talking about the digit

Answer 30

Yeah

Answer 31

like yes in mn
the m value is 10m
but they are just about m when they say ten's digit

Answer 32

n-m=3
n=2m

So you understand our equations look like this?

Answer 33

for our problem

Answer 34

lol this is probably dumb to point out
but when I write mn above I hope you know I don't mean the product of m and n
like mn is suppose to represent a number where m is 10's digit and n is 1's digit
but I already said this
but just in case it got lost up there I wanted to say it again

Answer 35

Cause in the end it will be 41...I see okay 4*10 and 1*1
Yes
I do understand those equations

Answer 36

cool stuff

Answer 37

Thanks man

Answer 38

np

Answer 39

if you want to do your problem and I check your values for m and n
I can

Answer 40

M is 1
N is 2

Answer 41

21 is the numeral

Answer 42

let's see I think something happened because the difference there isn't 3

Answer 43

Ahh

Answer 44

n-m=3
n=2m

so you plugged second equation into first equation giving you
2m-m=3

Answer 45

so m=?

Answer 46

😂 sorry I'm being slow
M is 1

Answer 47

Isn't it

Answer 48

n-m=3
since n=2m we can write this as 2m-m=3
but we know 2m-m=m
so we have m=3 since 2m-m=3

Answer 49

and then since you know n=2m then you can replace m with 3 and find n

Answer 50

m=3
n=2m=2(3)=?

Answer 51

M is 3

Answer 52

right and n=?

Answer 53

6

Answer 54

mn=36
notice the difference of 6 and 3 is 3
and that 6 is twice the number 3 is
we did it

Answer 55

So meaning the numeral is 36

Answer 56

yep

Answer 57

Okay noooow I think I got it

Answer 58

Do you want to try solving another one similar to it? I can make one up.

Answer 59

If you want to here is another:
The difference between the digits of a 2-digit numeral is 6.
The one's digit is three times the ten's digit.
What is the numeral?

Answer 60

39 is the numeral

Answer 61

omg omg
you did it

Answer 62

good job you

Answer 63

😂😂😂 Loool
Thanks though

Answer 64

np