What does this simple rebus mean?

There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

Jigsaw captured 100 people and make them stand in a circle and all these people are labelled as Person1, Person2, Person3... Person100. He made them play a crazy game in which Person 1 shot Person 2 and pass the gun to the next person and so on until one stands alive.

Which person will survive in the end?

Count the number of triangles in the given picture.

what one word does the below rebus identifies?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

Jenifer and Jesica are having a conversation.

Jenifer: I am definitely not over 30.
Jesica: I am 28 and you are surely 5 years older to me at least.
Jenifer: No, you are at least 29.

You are told that both of them are lying throughout in the conversation. Can you find their respective ages?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

What can you deduce from the following BrainBat?

CRY
LMKI

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