38
-4 and -17
The pattern in the sequence 11 12 14 17 21 is an increasing sequence where each number is the sum of the previous number and a specific value. In this case, the specific value is increasing by 1 with each subsequent number. So, starting from 11, we add 1 to get 12, then add 2 to get 14, add 3 to get 17, and add 4 to get 21.
You can add any one of 13, 15, 17, 19 and 21.
-17
Add all of the numbers, and divide the result by how many numbers there are.21 + 17 + 14 + 28 + 15 = 9595 / 5 = 19
The number halfway between 13 and 21 can be found by taking the average of the two numbers. Add 13 and 21 together to get 34, then divide by 2 to get 17. Therefore, the number halfway between 13 and 21 is 17.
17, 19, 21 and 23.
17, 18, 19, 20 and 21.
They are 17, 18, 19, 20 and 21.
There are 5 numbers in your list. Add them up and divide by 5.
17/21 = 0.8095 17/21 = 17 ÷21 = 0.8095
You add the numbers, then divide the result by 3. In this case you divide by 3 because there are 3 numbers.