Which Number is the odd one out?

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

What is the word or phrase below?
R | E | A | D

In a basket of apples,
when counted in twos, there was one extra
when counted in threes, there were two extra when counted in fours, there were three extra
when counted in fives, there were four extra
when counted in sixes, there was five extra.

However, if the apples were counted in sevens, no extra apple was left. Can you calculate the minimum number of apples that were present in the basket?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

How many times do a clock's hands overlap in a day ?

It belongs to you, but other people use it more than you do. What is it?

A man lives on the fifteenth floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator, and, if there is someone else in the elevator, or if it was raining that day, he goes back to his floor directly. Otherwise, he goes to the tenth floor and walks up five flights of stairs to his apartment. Can you explain why he does this?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

Take away the whole and some still remain. What is it?

What am I?