Why Wine Glass Stem is so long?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

Which is the smallest number that you can write using all the vowels exactly once?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

A non-stop marathon is the shared favourite sport of three brothers.

*The oldest one is fat and short and trudges slowly on.
*The middle brother's tall and slim and keeps a steady pace.
*The youngest runs just like the wind, speeding through the race.

"He is young in years, we let him run!" the other two brothers explained, "'because though he is surely number one, he is second, in a way." Why is it?

What occurs twice in a week, once in a year but never in a day?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?