People put me on the table and cut me but do not eat me. What am I?

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?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

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

What number divided by 4 is the same as that number minus 4?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

What does this rebus means ?

PROG WORKRESS

If 1+9+8=1, what is 2+8+9?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Alex opened 24 presents
Jonah opened 8 presents
Clara opened 1 present

Can you find out how many presents were opened by Candy?