They are: 0, -5, -10
12, 10 and 15 the are alternatively increased by 2 and 3
42 123 243
The next number is 30. The numbers are increasing in multiples of 5.
6, 15, 24, 33, 42, 51, 60
27, 33, and 39. The pattern adds 6 each time
The Next NumberThe next number is 25 if you use the following pattern: 5, (the number 10), 15 (the first number +10), (the number 10), and the next number is the third number +10 or 25.or you could think of it this way:5, 10 (+5), 15 (+5), -5 (10)The pattern is +5, +5, -5, so the next number would be 15, the next 20, and the next 15.
5+5 = 10 10+5 = 15 15-5 = 15 10+5 = 15
12, 10 and 15 the are alternatively increased by 2 and 3
The numbers are halving each time, so the next three are 60, 30 and 15.
5
42 123 243
The next number is 30. The numbers are increasing in multiples of 5.
6, 15, 24, 33, 42, 51, 60
27, 33, and 39. The pattern adds 6 each time
11, -10, 9
15, 21 (the triangular numbers)
there is not much of a pattern there but i would say 45