Which alphabet letter is a question?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

The more it dries, the wetter it becomes. Can you tell what it is?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

I am the largest in my family of fifty.
The youngest of our family lives separately from the rest of the family and so do I.
I am regarded as harsh and tough.
I am so large, you cut me in two equal halves,
each half would still be larger than the second largest member of the family.
Who am I?

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?

I can write cow in 13 letters.

Can You?

10+10 and 11+11 can give you the same answer.

Explain how?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?