Can you find out what is missing?

1 3 5
2 4 ?

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

I am 5 letters long.
My first two tell you who I am
My first 3 could be a medicine
My last three reversed could be a young boy.
My 4th, 3rd and 2nd in that order could be a fruit drink.
If you have me you may hang me round your neck
WHAT AM I ?

Different lights make me strange by changing me into different sizes. What am I?

Why do you find that most of the buildings are deprived of the 13th floor?

John and Jill are madly in love with each other. To remind Jill of his pure love, John wants to send her a ring by post but in their country where burglary is quite prominent, any package that is not locked comes under the risk of being stolen for the contents.

John and Jill possess many padlocks but neither one of them has the other key.

Can you find a way John can send the ring to Jill safely?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

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

Can you solve the photo plexer logic ?

Replace the question mark with the correct number in below Picture:

Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?