436 is the best choice for the next number in the sequence because:
The Pattern: Square the term, then take away 5, add one, and square it again, and so on.
Un = (Un-1)2 for n = 3k+1
Un = Un-1 - 5 for n = 3k+2
Un = Un-1 + 1 for n = 3k
In other words,
436.
One possible sequence is Square, -5, +1, Sq, ...
None. "Complete" implies that the number you are seeking is the LAST one: there can be no more after it. The sequence given above can be continued infinitely and so cannot be completed.
436
56 (just the next number, not the number that completes the sequence)
The number which best completes the sequence below is 20 5 30 6 42 7
56
32=99-5=44+1=552=2525-5=2020+1=21212=441
Not sure about "completes" because the sequence continues. The next number is 20 and you can verify that by fitting the following cubic equation: u(n) = 5*(-n3 + 36n2 - 257n + 558)/12 for n = 1, 2, 3, 4, ...
56 (just the next number, not the number that completes the sequence)
56
54
13 20 12
The number which best completes the sequence below is 20 5 30 6 42 7
21 441 22 23 529 506
17 19 20
1, 10, 2, 20, 3, 30, 4, 40, 5, 50, and so on.
56
The nth term is: 5n
32=99-5=44+1=552=2525-5=2020+1=21212=441
Not sure about "completes" because the sequence continues. The next number is 20 and you can verify that by fitting the following cubic equation: u(n) = 5*(-n3 + 36n2 - 257n + 558)/12 for n = 1, 2, 3, 4, ...