How many triangles can you find in this given picture?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

Pronounced as 1 letter, And written with 3, 2 letters there are, and 2 only in me. I’m double, I’m single, I’m black blue and grey, I’m read from both ends, and the same either way. What am I?

What is the riddle which can be asked all day with a different correct answer each time.

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

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

Find the missing letter in the last circle logically in the given below picture.

In an Art Gallary, When the clock hit 11 am, Artist hung the painting number 30. When it struck 4 pm, he hung painting number 240 and when it struck 7:30 pm, he hung painting number 315.

Can you determine, which painting number will he hang when the time is 9:20 pm?