Math is help in the all field of life. Every subject, every field where are you see math are present. We can use it in the field of game also. We want to know about a interesting game which you can play with me. For starting the play you choose a number as you wish. After that you double this number. Let us you choose a number p & double of this q. in q you add the number 20. Let us that after adding the number r you subtract the initial number as you choose. Let us that your answer will be s. & then tell that your answer will be equals to 10.that means s=10. You don`t be serious because it is not high math. In which number you say for adding. Let us you say about adding a number x. then half of this that means x/2 will be the answer of this game. You can tell about the answer of question quickly. It is not danger calculation because you choose a number y. double of this number are equal to 2y. If you add a number 20 then this will be equal to 2y+20. And half of this number are equals to [2y+20]/2 = y+10. If you subtract a number as you choose that mean y. then answer will be y+10-y=10. That means half of the number which we add is the answer of the question. Now you can understand that it is a very simple mathematics. If you want to know about the leap year then you devided by the 4 in the year. If remainder are equal to zero that mean leap year another not a leap year. For example if you devided by 4 in 2004. Then you see that remainder are equal to zero that means 2004 is leap year & next leap year of 2004 are 2008. Because leap year is a multiple of 4. These all example of the math in the field of a game. i think that all of you understand easily.