How many triangles are there in the picture below?

Different lights make me strange by changing me into different sizes. What am I?

Using Only Five 5's and any mathematical operator make sum as 37

A boy collects white seashells from the sea and brings them home every night. When he has enough of them, he decides to sell them to a trader.

The trader is ready to buy the shells and he asks the boy about the quantity. At this, the boy starts calculating. He has a giant box that contains 3 mini boxes. Two of them have another mini box inside. If the giant box can hold 50 shells, how many brown shells can he sell to the trader?

I am sure no one can have two things for dinner. what are they?

Before Mount Everest was discovered, what was the highest mountain in the world?

Tell me the Hindi name of a Vegetable which if we remove 1st word will become a precious Stone and by removing the last word it will become a sweet eatable.

How can one talk without saying a single word?

10+10 and 11+11 can give you the same answer.

Explain how?

Which digit occurred maximum times between the number 1 and 1000?