what does this picture(rebus) riddle means ?

You are given four tennis balls and asked to arrange those balls in a manner that the distance between each one of them is exactly equal. How will you do it?

He loves to dance, twist and prance, he shakes his tail, and as a way he sails, wingless he flies into the sky. What is he?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

What English word has three consecutive double letters?

During which month do people sleep the least?

How many triangles can you count in the figure given?

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.

What is the next shape from answers A, B, C, and D figure?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?