The next number in the sequence 3-15-6-30-21 is -207.
I'm guessing your sequence is 1, 3, 6, 10, 15, ... In which case it continues: 21, 28, 36, 45, 55, 66, ... (These are the triangular numbers.)
28
No, according to algebra there is no real answer. But if you take the numbers 35, 45, 50 and 51, it would be 51.125(The number that increases itsself divides by 3 everytime)
3 * 15 = 45 or 15 = 45 / 3 or 3 = 45 / 15
The sequence reflects a pattern of multiplying by 3, then adding 3, to each successive value. The next value would be 144. Explanation: 4x3=12, 12+3=15, 15x3=45, 45+3=48, 48x3=144
The next number in the sequence 3-15-6-30-21 is -207.
The pattern in the sequence 0, 3, 9, 21 involves adding consecutive odd numbers. Starting with 0, then adding 1+2, 3+6, and 9+12 gives you the next number in the sequence. Therefore, the next number would be 21 + 15 = 36.
Start with 3 and multiply by 5 and 3 alternately in sequence.
I'm guessing your sequence is 1, 3, 6, 10, 15, ... In which case it continues: 21, 28, 36, 45, 55, 66, ... (These are the triangular numbers.)
idk but i was going to ask that one. The next number in ther sequence is.... 45 ! The difference between each number increases by three each time (3-0=3, 9-3=6, 18-9=9, 30-18=12 therefore 45-30=15) !
14
15 since you multiply by 3 then subtract 3 in sequence
28
No, according to algebra there is no real answer. But if you take the numbers 35, 45, 50 and 51, it would be 51.125(The number that increases itsself divides by 3 everytime)
3 * 15 = 45 or 15 = 45 / 3 or 3 = 45 / 15
The next number in the sequence is 48.