Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

A container contains 100 eggs. They can be either fresh or rotten. What is sure is the fact that there is at least one fresh egg in that container.

If you are asked to pick two eggs randomly from the container, at least one of them will be rotten.

Can you calculate how many eggs in that container are fresh?

An American nightclub called 'The Coconut Grove' had a terrible fire in which over 400 people died. A simple design flaw in the building led to a high death toll. Subsequently, regulations were changed to ensure that all public buildings throughout the country eliminated this one detail, which proved deadly. What was it?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

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

Six people park their car in an underground parking of a store. The store has six floors in all. Each one of them goes to a different floor. Simon stays in the lift for the longest. Sia gets out before Peter but after Tracy. The first one to get out is Harold. Debra leaves after Tracy who gets out on the third floor.

Can you find out who leaves the lift on which floor?

If two's company, and three's a crowd, then whats four and five ?

Can you fill the blank with the correct number?

6 30 870 756030 _____

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain