How many triangles can you find in this given picture?

Check out the number list below and find what number comes next in the sequence.

111 , 113 , 117 , 119 , 123 , 137 , ?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

Which number should replace the question mark?

Can you count the number of squares in the given picture?