What is the sum of odd numbers from 6 to 57? Here we will show you step-by-step how to calculate the sum of odd numbers from 6 to 57.
Step 1) We start by finding the first (F) and last (L) odd numbers from 6 to 57. It is easy to do that by simply looking at the numbers. The first odd number is 7, and the last odd number is 57.
F = 7
L = 57
Step 2) Next, we calculate the total odd numbers (T) there are from 6 to 57, using a formula. Here is the formula and the math:
T = (L - F + 2) ÷ 2
T = (57 - 7 + 2) ÷ 2
T = 52 ÷ 2
T = 26
Step 3) Finally, we use the information from Step 1 and Step 2, and another formula, to calculate the sum of odd numbers from 6 to 57, like this:
Sum = (T ÷ 2) × (2 × F + (2 × (T - 1))
Sum = (26 ÷ 2) × (2 × 7 + (2 × (26 - 1))
Sum = 13 × (14 + 50)
Sum = 13 × 64
Sum = 832
Sum of odd numbers from 6 to 57 = 832
Sum of Odd Numbers Calculator
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