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

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

Can you fill the blank with the correct number?

6 30 870 756030 _____

Two friends decide to get together; so they start riding bikes towards each other. They plan to meet halfway. Each is riding at 6 MPH. They live 36 miles apart. One of them has a pet carrier pigeon and it starts flying the instant the friends start traveling. The pigeon flies back and forth at 18 MPH between the 2 friends until the friends meet.

How many miles does the pigeon travel?

I have branches, but no fruit, trunk or leaves. What am I?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?