You knock a Table over in the library, and suddenly 20 eyes are looking at you.

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

What four weights can be used to balance from 1 to 30 pounds?

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.

Rearrange the letters in "new door" to make one word.

Who has married many women but was never married?

What does it mean?

Which Number is the odd one out?

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

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

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?