What begins with T, ends with T, and has T in it?

Prove that the below maths equation is true.

8 + 8 = 91

The host of a game show offers the guest a choice of three doors. Behind one is an expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

Why did Buffon take the goal with him after every Juventus match?

Why is the longest human nose just 11 inches?

You have three orange, two pink and five purple balls in the drawer beside your bed. There is no electricity and the room is entirely dark. How many balls must you take out to ensure at least one ball of each colour at least?

Find the hidden tiger in the given optical illusion ?

Can you find the six hidden animals in the picture below?

What goes through cities and fields, but never moves?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3