A shopkeeper baked 13 cakes on Monday, 11 on Tuesday, 9 on Wednesday and 7 on Thursday. How many cakes will he bake on Saturday?
Seema has 15marbles on Monday. Her brother gave 5 more on Tuesday and took away 3 from her on Wednesday and she received 7 from a friend on Thursday. How many marbles will she have on Saturday if her brother gave her 5marbles on Friday?