What has many keys but can’t open a single lock?

Why Aeroplane windows are round?

Mother's Name is Mrs. SIXTY TWO
Son's Name is FIFTY TWO
Daughter's Name is FORTY TWO
What is Name of Father?

What does the below rebus riddle means?

What is the coolest letter in the alphabet?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

What runs around the whole yard without moving?

Can you make four (4) nines (9) equal 100?

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 ?

Can you find a number that lies one third of the distance between 1/3 and 2/3?