Numbers

Ali knows how to count, but he is now learning how to write numbers. As he is a very good student, he already learned 1, 2, 3 and 4. But he did not realize yet that 4 is different from 1, so he thinks that 4 is another way to write 1. Besides that, he is having fun with a little game he created himself: he make numbers (with those four digits) and sum their values. For instance: 132 = 1 + 3 + 2