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

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

A bomb exploded in a room full of married couples and no one died. How?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

A woman lives in a Tall building thirty-six floors high and served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?