Q.1) Giri had 90 more marbles than John.  He lost 15 marbles while John lost 36 marbles.  Giri then gave John 66 marbles.  How many more marbles did John have than Giri in the end?

Dear Student,
Please find below the solution to the asked query:

Let the number of marbles John had be x. ThenThe number of marbles Giri had=x+90As, Giri lost 15 marbles and John lost 36 marblesSo, the number of marbles John had now=x-36And the number of marbles Giri had now=x+90-15=x+75Also, after giving 66 marble to John,the number of marbles  John had now=x+75+66=x+141and the number of marbles left with Giri=x-36-66=x-102Now,As, x+141-x-102=x+141-x+102=243So, John have 243 more marbles than Giri have at the end.

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