A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

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?

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

Three people are in a room. Ronni looks at the Nile. The Nile looks at Senthil. Ronni is married but Senthil is not married. At any point, is a married person looking at an unmarried person? Yes, No or Cannot be determined.

Two guards were guarding the camp.Guard-1 was looking towards the south to make sure no threat is coming from the road.Guard-2 was looking at the north to make sure no threat is coming from the top. Suddenly Guard-1 ask the Guard-2 why he is smiling?How Guard-1 knows that Guard-2 is smiling?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

The current time can be represented by below textual rebus.

0
=========
B.Sc
LLB

Can you tell us the current time?

John was piloting a plane behind a car but was never able to overtake it. Why?

What kind of tree can you carry in your hand?