So...
Your number is between 3000 and 4000
The sum of its digits is 21.
The product of the thousand and ones digits 24.
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?
3 answers
What about the hundreds digit?
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