Not sure about "completes" but one possible answer for the next number in the infinite sequence is 32. Why?
It is generated by the polynomial:
t(n) = (-n4 + 14n3 - 65n2 + 136n - 180)/12 for n = 1 , 2, 3, etc.
The squence stated begins with 20. The number is then divided by 4. The next number is the divider + 1 multiplied by the quotient.
The next numbers would be 8x7 and 7+1, ie. 56 and 8
11 is the next number, it goes up one more than the last time each one so +2 +3, +4.. so on, so on.
Because 5x6=30, 6x7=42, 7x8=56,8x9=72....
56
56 (just the next number, not the number that completes the sequence)
56
54
The number which best completes the sequence below is 20 5 30 6 42 7
75The number which best completes the sequence 10 30 15 16 48 24 25 is 75.
56
1, 10, 2, 20, 3, 30, 4, 40, 5, 50, and so on.
Nn
75
75.
next in the sequence: 10,20,30,20
10