195797

To work out quickly if the answer will be odd or even you can add the top right bottom right and bottom left corners and then add the bottom right again this will either give you an odd or even result.

Next to find an answer that adds up to 200 you first need to know that

Tl x 20 + TR x11+ BLx11 + BRx2 = your final answer

Using this you can go down in twenties from 200 until you find a number you can make with elevens and even numbers under twenty