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

Who am I?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

Three people check into a hotel. They pay $60 for the rent of the room. After they check-in, the manager realize that the rent for the room is $55. So, he gives $5 to the bellboy and asks him to give it to them. The bellboy thinks that it will be difficult for the three people to share $5 among them and seeking the personal benefit, he pockets $2 and gives the remaining $3 to them.

Now, each person paid $20 and got back $1. In this manner, each of them paid just $19 which totals to the amount of $57. The bellboy has $2 with him and adding them, we get $59. So where is the remaining $1?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

I organized a small get together at my home.
In the party , i have a barrel with some whiskey in it.

Suddenly Guest 1 say 'I bet this barrel of whiskey is more than half full'.
'No, it's less than half full' Guest 2 replied.

I don't have any measuring instrument and without removing whiskey from it , how can i determine which of the guest is right ?

Do You See It?

You see me once in June, twice in November, and not at all in May. What am I?

Can you find the dog hidden in a group of pandas?

Can you Find and name the hidden bird in the picture below ?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?