When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

Chef Andrea has to light the kitchen stoves to open her restaurant for the day. There are three stoves in the kitchen: A glass stove, a brick stove, and a wood stove. She only has one match. Which does she light up first?

Chhote se Chintu Miyan,
Lambi si Pooch.
Jahan Jaye Chintu Miyan,
Wahan Jaye Pooch.

छोटे से चींटू मियाँ,
लंबी सी पूंछ।
जहाँ जाये चींटू मियाँ,
वहाँ जाये पूंछ।

Bolo kya?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

What do you answer even though it never asks you questions?

In the image given, you can find several triangles. Can you count them all?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?