What is so fragile that saying its name breaks it?

Decode this picture on T-Shirt and tell what it says ?

A man was driving a black truck. His lights were not on. The moon was not out. A lady was crossing the street. How did the man see her?

Can you count the number of quadrilaterals in the picture below?

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

Can you solve the rebus below?

81 x 9 = 801. What must you do to make the this equation true?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

What word is pronounced the same if you take away four of its five letters?