This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

I add 5 to 9 and get 2. The answer is correct, so what am I?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

What demands an answer, but asks no questions

On a magical land of Mexico , all the animal in the land are rational.

There are 10 tigers and one goat.
Tiger can eat goat but since it's a magical land , the tiger who eats the goat , turns into goat and then can be eaten by the remaining tiger(s).

If we leave them for some time then how many goat and tiger will be there , when we come back ?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

Check out the number list below and find what number comes next in the sequence.

111 , 113 , 117 , 119 , 123 , 137 , ?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?