Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

I am a ten letters word
The first four letters have the power to rule,
Next, four-letter can be eaten.
The next three-letter represents a lady.
I can fly as well

what am I looking for?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

How can you make number one disappear by adding something to it?

A man dies of old age on his 25 birthday. How is this possible?

What always comes into a house through the keyhole?

A boy collects white seashells from the sea and brings them home every night. When he has enough of them, he decides to sell them to a trader.

The trader is ready to buy the shells and he asks the boy about the quantity. At this, the boy starts calculating. He has a giant box that contains 3 mini boxes. Two of them have another mini box inside. If the giant box can hold 50 shells, how many brown shells can he sell to the trader?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?