Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?

What building has the most stories?

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?

If 21x = 79x, what is the value of x?

Replace the question mark with the correct number.

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

What number do you get when you multiply all of the numbers on a telephone's number pad?

In the image given, you can find several triangles. Can you count them all?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?