using four different digits, what is the least sum you can get when you add two 2-digit numbers

10+21=31

oops i used twice, do 10+23=33

10+10+0+0=20

02+03=05

02 + 03 =5

To find the least sum you can get when you add two 2-digit numbers using four different digits, we need to consider the smallest possible values for each digit.

Let's start by choosing the smallest digit, which is 0. However, we cannot use 0 as the first digit of a 2-digit number, as it would make the number a 1-digit number. So, we will not use 0 as the first digit.

Next, let's choose the second smallest digit, which is 1. We can use 1 as the first digit of the two 2-digit numbers.

For the remaining two digits, we can choose any two distinct digits from the set {2, 3, 4, 5, 6, 7, 8, 9}. Let's choose 2 and 3.

Now, we can form two different 2-digit numbers using the chosen digits: 10 and 23.

To find the least sum, we add these two numbers together:

10 + 23 = 33.

Therefore, the least sum you can get when you add two 2-digit numbers using four different digits is 33.