The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

First, think of the colour of clouds. Next think the colour of snow. Last, think of the colour of the moon. Now, what do cows drink?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

Can you find out the total number of triangles in the given figure?

Identify The phrase in the picture.

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?

Complete the table series riddle by finding the number that can replace "??".

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?

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