Buy me, smell me or deliver me, I do not change.

Who am I?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

What occurs twice in a week, once in a year but never in a day?

What can go through glass without breaking it?

I know a nine-letter word having only one vowel.
Do you ?

Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

There is an exact a week gap between Christmas and New Year. Hence, It is obvious that the new year that comes right after Christmas comes on the same day of the week.

A Strange thing happened in the Year 1777. Christmas occurs on Wednesday and New Year on Monday. How is that possible?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?