Sum of even numbers from 18 to 46


Sum of even number

What is the sum of even numbers from 18 to 46? Here we will show you step-by-step how to calculate the sum of even numbers from 18 to 46.

Step 1) We start by finding the first (F) and last (L) even numbers from 18 to 46. It is easy to do that by simply looking at the numbers. The first even number is 18, and the last even number is 46.

F = 18
L = 46

Step 2) Next, we calculate the total even numbers (T) there are from 18 to 46, using a formula. Here is the formula and the math:

T = (L - F + 2) ÷ 2
T = (46 - 18 + 2) ÷ 2
T = 30 ÷ 2
T = 15

Step 3) Finally, we use the information from Step 1 and Step 2, and another formula, to calculate the sum of even numbers from 18 to 46, like this:

Sum = (T ÷ 2) × (2 × F + (2 × (T - 1))
Sum = (15 ÷ 2) × (2 × 18 + (2 × (15 - 1))
Sum = 7.5 × (36 + 28)
Sum = 7.5 × 64
Sum = 480
Sum of even numbers from 18 to 46 = 480


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