Bay of Bengal is in which state?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

People put me on the table and cut me but do not eat me. What am I?

Can you count the number of matches in the picture below ?

Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?

I have branches, but no fruit, trunk or leaves. What am I?

There were three women in all the swimming costumes!
One was happy and the other two were sad!
The happy one was crying and the sad ones were smiling.
Why was this?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

You are playing a game with your friend Jack. There are digits from 1 to 9. You both will take turn erasing one digit and adding it to your score. The first one to score 15 points will win the game.

Would you want to play first or second?

PS: The sum should be exactly 15.