6 and 10
Dart Board
what are the next 2 numbers in this sequence: 20 , 1 ,18 ,4 ,9 ,1
After 13, it's 18.
The nest number in the sequence is 18. Note that the difference between each number and the next number in the sequence follows the simple sequence of 1,2,3,4. Obviously the next in the sequence of increases is 5, so 13+5=18.
18
The next number in the sequence is 6. The numbers represent the scores travelling around a regular dartboard, clockwise from the top.
Every next number is increased by 5. The next number in the sequence is 23.
18
42 is the next number in this sequence. This number sequence is adding the next prime number to the last number. So 1 + 2 = 3. Then 3 + 3 = 6, 6 + 5 = 11, 11 + 7 = 18, 18 + 11 = 29. The next prime number after 11 is 13, so 29 + 13 = 42. The next numbers would be 59 (42+17), 78 (59+19), and 101 (78+23)
The next number in the sequence would be 23. The sequence consists of prime numbers.
The next number in the sequence is 18. It's +1, +2, +3, +4, ....
possibly 16