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

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

Which is faster, Heat or Cold ? Explain.

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

In the given picture, you can find two letters missing. When two particular letters are placed in the missing spots, you get an eight-letter word while reading in the anti-clockwise direction. Can you find out the missing letters and the missing word eventually?

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?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

Find the missing letter in the last circle logically in the given below picture.

How many bricks does it take to complete a building that is 15 feet wide, 30 feet deep, and 12 feet tall made of brick?