the answer is 72.:)
65
The sequence appears to alternate between two patterns. The first pattern consists of multiplying the previous number by 3 (7 to 21), and the second pattern involves simply increasing the last number by 1 (8 to 9). Following this logic, after 9, the next number should be (9 \times 8 = 72), leading us to conclude that the next number in the sequence is 10, which would continue the pattern. Thus, the next number is 10.
45
72
the answer is 72.:)
72
65
7, 21, 8, 72, 9, ?
The sequence appears to alternate between two patterns. The first pattern consists of multiplying the previous number by 3 (7 to 21), and the second pattern involves simply increasing the last number by 1 (8 to 9). Following this logic, after 9, the next number should be (9 \times 8 = 72), leading us to conclude that the next number in the sequence is 10, which would continue the pattern. Thus, the next number is 10.
I don’t know
45
72
21 - 72 = -51
243 is one possibility.
16
The pattern of these numbers is the square numbers. Therefore, following 42 = 16 comes 52 = 25, 62 = 36, 72 = 49.