There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What 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?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

What common phrase is represented by the below lines

Easy going:
Weak, 'I'm going.'
Tough, 'I'm staying.'

Medium going:
Weak, 'I'm going.'
Tough, 'I'm staying.'

Tough going:
Weak, 'I can't do it, I'm staying!'
Tough, 'Let's get going.'

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?