Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?

What is the coolest letter in the alphabet?

In a guessing game, five friends had to guess the exact numbers of apples in a covered basket.
Friends guessed 22, 24, 29, 33, and 38, but none of the guesses was correct. The guesses were off by 1, 8, 6, 3, and 8 (in random order).

Can you determine the number of apples in a basket from this information?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

You order chicken wings at KFC in the boxes of 6, 9 and 20. What is the largest number of wings that you cannot obtain by buying in any combination of the boxes?

What part of the chicken has the most feathers?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

There are 3 apples in the basket and you take away 2. How many apples do you have now?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

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?