The next figure would be 21, followed by 11 & 10.
10
yes it is
There is no problem with that sequence.
If you mean: 9, 19, 39, 69 then the next number in the sequence is 109
19
The next figure would be 21, followed by 11 & 10.
The nth term is 4n-1 and so the next term will be 19
The next three numbers in the sequence are 23, 25, and 27.
18
39
The next number in the sequence is 27.
The next number in the progression is 43 - the sequence continues to increase by ascending odd numbers.
g
55
10
1 5 2 8 12 9 151 to 5: +45 to 2: -32 to 8: +68 to 12: +412 to 9: -39 to 15: +615 to ?: +4Thus, the looping sequence of operations between terms is: +4, -3, +6.Just add 4 to 15 to find the answer, 19.