Can you find out which number multiplied by itself will give the output as 12345678987654321?

Can you count the number of triangles in the picture below?

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?

I look at you, you look at me I raise my right, you raise your left. What am I?

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?

The Little ant seems to be always confused. Do you know why?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

Can you decipher the two rows to find the hidden word?

John: "Hi Teacher, What is your favourite movie ?".
Chemistry Teacher: "Indium Cerium Platinum Iodine Oxygen Nitrogen".
Ten seconds later... John replied I got it.

Do you?

When can we add 2 to 11 and get 1 as the correct answer?