How many words can a pen with half refill write?

Which is the smallest number that you can write using all the vowels exactly once?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

Can you make the number 24 by utilizing the numbers 1, 3, 4 and 6? You must use one number only one time and you can use mathematical operation symbols anytime anywhere.

John and Jill are madly in love with each other. To remind Jill of his pure love, John wants to send her a ring by post but in their country where burglary is quite prominent, any package that is not locked comes under the risk of being stolen for the contents.

John and Jill possess many padlocks but neither one of them has the other key.

Can you find a way John can send the ring to Jill safely?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

Can you find the key in the picture below?

Solve the below puzzle by replacing the question mark with the correct number.

3 6 12

4 8 16

5 10 ?