5
Ten.
75 Pattern: times 3, divided by 2, plus 1
The next number is -21
the answer should be 5
5
10
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.
11
35
The Answer is 75.
5
5 10 15 10 5
21here's whythere's an increasing additive in there. 1+2=3, 3+3=6, 6+4=10, 10+5=15, 15+6=21. get it?
5+5 = 10 10+5 = 15 15-5 = 15 10+5 = 15
The series 1 6 10 13 15 (1+5=6; 6+4=10, 10+3=13; 13+2=15) is completed by 15+1=16. The answer is 16.
The next number in the sequence is 48.