An American nightclub called 'The Coconut Grove' had a terrible fire in which over 400 people died. A simple design flaw in the building led to a high death toll. Subsequently, regulations were changed to ensure that all public buildings throughout the country eliminated this one detail, which proved deadly. What was it?

Prove that the below maths equation is true.

8 + 8 = 91

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Replace the question mark with the number below given a simple math problem.

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

There is a wide field of corn. A goose finds its way into the field and starts running. Can you find out till which point the goose can run into the field?

Who is that with a neck and no head, two arms and no hands? What is it?

Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation. Conditions: Each must be used exactly once and no other numbers or symbols can be used.

Which English verb becomes past tense just by rearranging the letters?

John is the son of Jacob.
So,
Jacob is the_____of John's father?