How many triangles are there on the puzzle below?

What can go through glass without breaking it?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

Solve this riddle by finding the odd one out from the rest.

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

I am the fastest animal but cannot climb the tree. What am I?