I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

The centre of the third figure is empty. What digit should fit inside?

A pack of cards has 40 cards. You are blindfolded. Out of 40, 25 cards are facing down while 15 are facing up. You have been asked to divide this pack of cards into two decks - so that each deck contains an equal number of face-up cards. Remember, you are blindfolded.

How will you do it?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?