6
1010
2000.The smallest four-digit number there can be is 1000. So, add 1000 and 1000 to get 2000, then least sum you can get when adding two four-digit numbers.
Add the last digit (units digit) to twice the previous digit (tens digit). If this sum is divisible by 4, so is the original number.
...you add them up with a calculator to make sure they are correct.
-- List the digits that are used to write the number. -- Add up the list.
Two-digit prime numbers whose digits add up to 10 are:193773
2000.The smallest four-digit number there can be is 1000. So, add 1000 and 1000 to get 2000, then least sum you can get when adding two four-digit numbers.
21
Sum means to add. You can not add with just one number?
"Sum" requires at least two numbers. So there cannot be athree digit number that sums to anything.
2222
Add the last digit (units digit) to twice the previous digit (tens digit). If this sum is divisible by 4, so is the original number.
what is the least possible sum of two 4-digit numbers?what is the least possible sum of two 4-digit numbers?
1000 + 1000 = 2000
33 is a two-digit number whose digits add up to 6. 60, 51, 42, 24, 15
To find the digit sum of a number you plus the first 2 numbers together, example:the number 18, 18 is made up of 2 digits 1 and 8.If you add the 2 digits together you get a total of 9.So that is the digit sum of 18.But if you use a higher number like 66 then the method has a small change.First if you add the two digits together it becomes 12.But 12 isn't a single digit sum.So again the 2 digits have to be added together to make a single digit sum.1+2=3 so 3 is the single digit sum for the number 66.
...you add them up with a calculator to make sure they are correct.
-- List the digits that are used to write the number. -- Add up the list.