78.
Fit the quartic polynomial
t(n) = (7n4 - 66n3 + 221n2 - 186n + 216)/24 for n = 1, 2, 3, ...
Don't know
54
6 is.
24, they are going up in 3's, 13, 16, 19 and 18, 21 so next number is 24.
Every next number is increased by 5. The next number in the sequence is 23.
18
The next number in the sequence is 18. It's +1, +2, +3, +4, ....
The next number is 116.
18 b/c the pattern is +1,+2,+3...
21
6 is.
24, they are going up in 3's, 13, 16, 19 and 18, 21 so next number is 24.
1 2 3 4 .12 & .13 & .15 & .18 & .22
The nest number in the sequence is 18. Note that the difference between each number and the next number in the sequence follows the simple sequence of 1,2,3,4. Obviously the next in the sequence of increases is 5, so 13+5=18.
24
18
18
Every next number is increased by 5. The next number in the sequence is 23.
the answer is 72.:)