Tricks on getting the sum of all even numbers from 2 through a 2-digit even number:

1. Choose 2-digit even number.
2. Divide the even number by 2 (or multiply by 1/2).
3. Multiply the result by the number next to it.

Example:

Find the sum of even numbers from 2 to 36.


Step 1: 36 is the 2 digit even number

Step 2: 36 ÷ 2 = 18

Step 3: 18 x 19 = 342

(The number next to 18 is 19. Multiply this to the result in step 2.)

Therefore, the sum of all the even numbers from 2 through 36 is 342.