What is the sum of even numbers from 30 to 141? Here we will show you step-by-step how to calculate the sum of even numbers from 30 to 141.
Step 1) We start by finding the first (F) and last (L) even numbers from 30 to 141. It is easy to do that by simply looking at the numbers. The first even number is 30, and the last even number is 140.
F = 30
L = 140
Step 2) Next, we calculate the total even numbers (T) there are from 30 to 141, using a formula. Here is the formula and the math:
T = (L - F + 2) ÷ 2
T = (140 - 30 + 2) ÷ 2
T = 112 ÷ 2
T = 56
Step 3) Finally, we use the information from Step 1 and Step 2, and another formula, to calculate the sum of even numbers from 30 to 141, like this:
Sum = (T ÷ 2) × (2 × F + (2 × (T - 1))
Sum = (56 ÷ 2) × (2 × 30 + (2 × (56 - 1))
Sum = 28 × (60 + 110)
Sum = 28 × 170
Sum = 4760
Sum of even numbers from 30 to 141 = 4760
Sum of Even Numbers Calculator
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