How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

What are the 50th, 63rd and 100th numbers in the sequence below?
4, 5, 8, 8, 9, 9, 12, 13, 13, 13, 17, 18, ...

How many words can a pen with half refill write?

Which of the below owl is odd one out?

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 two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

Find the next number in the series below

21 32 54 87 131 ?