Mathematics for IGCSE & O level - Sequences (Section 3 - No. 16)
What is the next term in the sequence: 1, 5, 12, 22,...?
35
36
37
38
คำอธิบาย
The sequence differences are 4, 7, 10, which increases by 3 each time. Therefore the next difference will be 13 and next term 22 + 13 = 35.