Beautiful Mind

After a long time I am posting something on my blog. Some of the mind blowing questions which I got from one of the books. Lets see how many of you can answer them. 

1. Take the letters ERGRO. Put three letters in front of it, and the same three letters behind to form a common English word.
2. What number gives the same result when it is added to 1.5 as when it is multiplied by 1.5?
3. Which of these numbers is the odd-one-out?
   43, 26, 50, 37, 17, 82
4. The following number has a rather special characteristic. What makes it unique?
   8549176320
5. What do the following numbers have in common?
   3, 7, 10, 11, 12
6. A certain number consists of two digits. The number is equal to five times the sum of its digits. If you add 9 to the number, the order of its digits is reversed. What is the number?
7. Replace the asterisks by the correct mathematical signs to make the expression equal to 99.
   16 * 12 * 2 * 3 = 99
8. What should the tenth number in this series be?
   3, 3, 5, 4, 4, 3, 5, 5, 4, ?
9. Rearrange these letters to form the name of a famous writer:
   I AM A WEAKISH SPELLER
10. What are the next four letters in this series.
    Y, Y, H, L, Y, E, Y, T, ...

Best of luck.

Kant_