Can you spot the hidden girl in the picture below?

15 caves are arranged in a circle at the temple of doom. One of these caves has the treasure of gems and wealth. Each day the treasure keepers can move the treasure to an adjacent cave or can keep it in the same cave. Every day two treasure seekers visit the place and have enough time to enter any two caves of their choice.

How do the treasure seekers ensure that they find the treasure in the minimum number of possible days?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?

Take one out and scratch my head, I am now black but once was red. What am I?

How many letters are in the alphabet?

If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?

What jumps when it walks and sits when it stands?

What kind of band never plays music?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?