Math Puzzles

Puzzle 1: What number replaces the Question mark?

Puzzle 2: What number replaces the Question mark?

If

111 = 13

112 = 24

113 = 35

114 = 46

115 = 57

117 =??

Puzzle 3: What number replaces the Question mark?

Puzzle 4: What number replaces the Question mark?

Puzzle 5: What number replaces the Question mark?

6 + 4 = 210

9 + 2 = 711

8 + 5 = 313

5 + 2 = 37

7 + 6 =???

Puzzle 6: Solve