What brings you down but never up?

Every words stands for unique digit that makes the arithmetic equation true

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

I cannot talk, but I always reply when spoken to. What am I?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

Can you name four days which start with the letter 'T'?

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

How is this possible?

How many triangles can you find in this given picture?

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

A cat, a dog and a monkey were stolen. 3 suspects got caught: Harish, Manoj and Tarun. All we know is each person stole one animal, but we do not know who stole which. Here are the investigation statements. Harish said: Tarun stole the cat. Manoj said: Tarun stole the dog. Tarun said: They both were lying. I did not steal the cat or the dog. Later on, the police found out the man who stole the monkey told a lie. The man who stole the cat told the truth. Can you find out who stole which?