Write all possible 2 digit numbers,sum of whose digits is 12.
9+3
8+4
7+5
6+6
and reverse
To find all possible two-digit numbers whose digits sum up to 12, we can systematically go through all the possibilities. Let's start by listing all the pairs of digits (a, b) where a is the tens digit and b is the ones digit:
(0, 12)
(1, 11)
(2, 10)
(3, 9)
(4, 8)
(5, 7)
(6, 6)
(7, 5)
(8, 4)
(9, 3)
(10, 2)
(11, 1)
(12, 0)
From this list, we can see that there are 3 possible two-digit numbers whose digits sum up to 12:
1. 21
2. 30
3. 03 (Note that we put a zero in front of 3 to represent the number ten)
Therefore, the possible two-digit numbers whose digits sum up to 12 are 21, 30, and 03.
To find all possible two-digit numbers whose sum of digits is 12, let's break it down step by step:
Step 1: Determine the possible values for the tens digit.
Since we're looking for two-digit numbers, the tens digit cannot be zero. It can range from 1 to 9.
Step 2: Determine the possible values for the units digit.
Since the sum of the digits should be 12, the units digit will be the remaining value needed to reach 12, after subtracting the tens digit from 12.
For example, if the tens digit is 1 (minimum value), then the units digit is 12 - 1 = 11.
Similarly, if the tens digit is 2, then the units digit is 12 - 2 = 10.
Step 3: List all the possible two-digit numbers.
Combine each possible tens digit with the corresponding units digit obtained in step 2.
For example, when the tens digit is 1, the corresponding units digit is 11, so the number is 11.
Continue this process for each possible combination of tens and units digits.
Here is a list of all possible two-digit numbers whose sum of digits is 12:
1. 39
2. 48
3. 57
4. 66
5. 75
6. 84
7. 93
Note that the tens and units digits could be flipped in some cases (e.g., 57 and 75).