Can you count the number of triangles in the given figure?

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.

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

On rolling two dices (six-sided normal dice) together, what is the probability that the first one comes up with a 2 and the second one comes up with a 5?

A man dies of old age on his 25 birthday. How is this possible?

What is the centre of gravity?

A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.
B: Nor do I know your number.
A: Now I know.

What are the four solutions for this?

By what process could you make a 'Tea-Table' into food?

A Man gave one of his sons 10 cents and another son was given 15 cents. What time is it?
Hint: Figure out the relation between time and number, is not so easy..:)

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?