Before Mount Everest was discovered, what was the highest mountain in the world?

Can you decipher the below rebus?

PBLUESAISNUERSES

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

You can hear me, but you can't touch or see me.

What am I?

The more of this there is, the less you see. What is it?

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

Count the Triangle in the figure given below: