What is special about the following number sequence?

8, 5, 4, 9, 1, 7, 6, 10, 3, 2, 0

Solution »

It's the numbers 0-10 in alphabetical order.

What is the next number in the sequence?

Here is a series of numbers. What is the next number in the sequence?

1
11
21
1211
111221
312211
13112221

Solution »

The next number in the sequence is 1113213211, because the rule for creating the next number is to simply describe the previous number. For example, you start of with 1, with is simply one 1, so the next number is 11. Now you have two 1's, so the next number is 21. Now you have one 2 and one 1, so the next number is 1211. The solution is to simply continue describing the previous number using only numbers.