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?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

When we see 2 but call 10?

Which fur should we be getting from the Lion?

A bank customer had $100 in his account. He then made 6 withdrawals. He kept a record of these withdrawals, and the balance remaining in the account, as follows:

Withdrawals Balance left
$50 $50
$25 $25
$10 $15
$8 $7
$5 $2
$2 $0
----- -----
$100 $99

Why are the Totals not tallying?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

What do you get if you add 2 to 100 four times?

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

Which is the rope you never skip with?