Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

Which is heavier: a ton of bricks or a ton of feathers?

Count the number of triangles in the below picture?

Two friends Smith and Andrew were talking about the bravery of their families. Smith told great stories about his courageous grandfather who fought for Britain in "World War I". Andrew told that his grandfather was so brave that in 1919 just after the war he was honoured with a bravery medal with the words "For our Courageous Soldiers In World War I" embedded into it. Smith knows that his friend is lying. How?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

I can be cracked, made, told, and played. What am I?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

Find the number of squares in the below-given picture.

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