Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

It is always ahead of me yet I can never see it. What is it?

Every words stands for unique digit that makes the arithmetic equation true

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

What word begins and ends with an E, but has only one letter?

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

In an office's desk, you find a unique method that shows the current day of the month. Two numbered cubes are used to depict the current date.

Can you find out the numbers on both the cubes so that each date can be mentioned using them?

Please note that you have to use both the cubes to display any date. Thus the 1st day must be represented by 01 and so on.

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

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

What kind of tree can you carry in your hand?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?