Finding Numbers when Given Relevant Values
Logical Reasoning, and more...
 
1. HARD

I am a 3 digit number. If you write me backwards, I am still a 3 digit number. If you add me and my backwards number, you will get 666. What is my middle digit?

 
2. HARD

I am the product of 4 consecutive prime numbers, and my last digit is 0. What is the sum of these 4 prime numbers?