How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

Count the number of triangles in the below picture?

I am Huge on Sunday and Saturday.
I am small from Tuesday to Thursday.
I do not exist on Monday and Friday.
Who am I?

Take away the whole and some still remain. What is it?

On a magical land of Mexico , all the animal in the land are rational.

There are 10 tigers and one goat.
Tiger can eat goat but since it's a magical land , the tiger who eats the goat , turns into goat and then can be eaten by the remaining tiger(s).

If we leave them for some time then how many goat and tiger will be there , when we come back ?

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?

Nodes are shown below and you need to connect them based on the following rule: Every node can be connected to the number of nodes inside them, i.e. the first node there is a value of 1 which indicates that the first node can connect to exactly one node only.Can you do it?

Find the missing number in the image below.

How is the moon similar to a dollar?

You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?