Yay! i answerd first
-1
24
40
12
The third multiple of 3 is 9 and the fourth multiple of 4 is 16. So 9 multiplied by 16 is 144.
Yay! i answerd first
The fourth Fibonacci number is 3, so the only possible answer is "3". It does indeed look as if every fourth number after that is a multiple of 3.
-1
24
24
The answer is 60
40
12
16
40
10, 36 and 900