What is the sum of even numbers from 56 to 158? Here we will show you step-by-step how to calculate the sum of even numbers from 56 to 158.
Step 1) We start by finding the first (F) and last (L) even numbers from 56 to 158. It is easy to do that by simply looking at the numbers. The first even number is 56, and the last even number is 158.
F = 56
L = 158
Step 2) Next, we calculate the total even numbers (T) there are from 56 to 158, using a formula. Here is the formula and the math:
T = (L - F + 2) ÷ 2
T = (158 - 56 + 2) ÷ 2
T = 104 ÷ 2
T = 52
Step 3) Finally, we use the information from Step 1 and Step 2, and another formula, to calculate the sum of even numbers from 56 to 158, like this:
Sum = (T ÷ 2) × (2 × F + (2 × (T - 1))
Sum = (52 ÷ 2) × (2 × 56 + (2 × (52 - 1))
Sum = 26 × (112 + 102)
Sum = 26 × 214
Sum = 5564
Sum of even numbers from 56 to 158 = 5564
Sum of Even Numbers Calculator
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