**easy math puzzle**

What number should replace the question mark? Consider four triangles, each with different numbers in its corners. Apply your math skills to solve this puzzle!

created by brainfans

Can you also solve

There are five number series puzzles on the picture. Each series continues with some number (replace the question mark with your number).

**Number series puzzle**There are five number series puzzles on the picture. Each series continues with some number (replace the question mark with your number).

topriddle