Even numbers.
11
11
11.
The sequence appears to alternate between adding and subtracting numbers. The pattern seems to be +11, -7, +5, -2, +6. Following this pattern, the next number in the sequence would be +3 from the previous number, which would be 21.
16
20
35
10 The sequence is given by xn = 60/n
10. (Don't ask why.)
10
11
11.
11
21
15
What number best completes the sequence 1 1/2 5 10 1/2 18
The sequence appears to alternate between adding and subtracting numbers. The pattern seems to be +11, -7, +5, -2, +6. Following this pattern, the next number in the sequence would be +3 from the previous number, which would be 21.