Question
A four digit number is between 3,000 and 4,000.The sum of its digits is 21.The product of the thousand and ones digits 24.The hundreds digit.What is the number?
Answers
I got no time
So...
Your number is between 3000 and 4000
The sum of its digits is 21.
The product of the thousand and ones digits 24.
Your number is between 3000 and 4000
The sum of its digits is 21.
The product of the thousand and ones digits 24.
I got no time
What about the hundreds digit?
mathhelper
Consider the number to be ABCD
We know that A = 3
so 3+B+C+D = 21
B+C+D = 17
"The product of the thousand and ones digits 24" ==== 3*D = 24
D = 8
That leaves B+C = 9
Once you have decided what the story is with the hundreds digit,
you will be able to finish it
so far we have:
3BC8 , where B+C = 9
We know that A = 3
so 3+B+C+D = 21
B+C+D = 17
"The product of the thousand and ones digits 24" ==== 3*D = 24
D = 8
That leaves B+C = 9
Once you have decided what the story is with the hundreds digit,
you will be able to finish it
so far we have:
3BC8 , where B+C = 9