If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

Next Number in the Series,

5, 16, 49, 104, ?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Two friends decide to get together; so they start riding bikes towards each other. They plan to meet halfway. Each is riding at 6 MPH. They live 36 miles apart. One of them has a pet carrier pigeon and it starts flying the instant the friends start traveling. The pigeon flies back and forth at 18 MPH between the 2 friends until the friends meet.

How many miles does the pigeon travel?

What is the next number in this matchsticks series riddle?

Can you spot the hidden girl in the picture below?

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?