When it's bad luck to meet a black cat?

Whats the next number in the below number sequence pattern.

If you say my name, I will no longer exist. What am I?

Which letter of the alphabet has the most water?

John bought a new car. He has a habit of eating ice cream from a particular ice cream shop while returning home from office. Whenever, he eats strawberry ice cream, he faces no problem. But whenever, he eats chocolate ice cream, the car starts giving problem. At first, he thinks, it is just a co-incidence but when this awkward incident happens for 3-4 times, he reports this problem to the company.

The mechanic of the company checks but finds no problem at all. The next day, when he stops by to eat chocolate ice cream, the car again starts giving problem.

Can you find the possible reason?

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

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

All of the flowers I have are orchids except two. All of the flowers I have are hibiscuses except two. All of the flowers I have are roses except two.

Can you tell me how many flowers I have?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

Can you solve below mathematical equation?

2^1234 - 2^1233