Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

A mathematics teacher took exams for his students. Out of the total students, 25% passed both the tests included in the exam. However, only 42% were able to clear the first test.

Can you find out the percentage of those students who passed the first test and also passed the second test?

What is the word or phrase?

I know a nine-letter word having only one vowel.
Do you ?

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

I am the beginning of everything, the end of everywhere. I'm the beginning of eternity, the end of time and space. What am I?

What does man love more than life, hate more than death or mortal strife; That which contented men desire; the poor have, the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

Count the squares in the matchstick puzzle below?

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

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?