What famous saying does this rebus mean?

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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?

Can you count the number of matches in the picture below ?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Can you solve the below geography rebus by decoding the below rebus ?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

Why is it very easy to weigh a fish?

They are three errirs in this question. Can you find them?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?