Sum of odd numbers from 1 to 60


Sum of odd number

What is the sum of odd numbers from 1 to 60? Here we will show you step-by-step how to calculate the sum of odd numbers from 1 to 60.

Step 1) We start by finding the first (F) and last (L) odd numbers from 1 to 60. It is easy to do that by simply looking at the numbers. The first odd number is 1, and the last odd number is 59.

F = 1
L = 59

Step 2) Next, we calculate the total odd numbers (T) there are from 1 to 60, using a formula. Here is the formula and the math:

T = (L - F + 2) ÷ 2
T = (59 - 1 + 2) ÷ 2
T = 60 ÷ 2
T = 30

Step 3) Finally, we use the information from Step 1 and Step 2, and another formula, to calculate the sum of odd numbers from 1 to 60, like this:

Sum = (T ÷ 2) × (2 × F + (2 × (T - 1))
Sum = (30 ÷ 2) × (2 × 1 + (2 × (30 - 1))
Sum = 15 × (2 + 58)
Sum = 15 × 60
Sum = 900
Sum of odd numbers from 1 to 60 = 900


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Sum of odd numbers from 1 to 61
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