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.
The odd one out in the sequence 2, 4, 6, 8, 10, 12 is 10. The pattern in the sequence is that each number is increasing by 2, except for 10, which breaks the pattern. The other numbers in the sequence follow a consistent pattern of increasing by 2, making 10 the odd one out.
20
35
10 The sequence is given by xn = 60/n
10. (Don't ask why.)
10
11
11.
11
21
15
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.
What number best completes the sequence 1 1/2 5 10 1/2 18