Complete the following number patterns.
- 610, 533, 456, , 302
- 45, 53, 62, 72, .
- 156, , 174, 181, 186
(a)
610 - 533 = 77
533 - 456 = 77
456 - 77 = 379
Pattern: Keep subtracting 77 from left to right.
(b)
53 - 45 = 8
62 - 53 = 9 (1 is added to 8)
72 - 62 = 10 (1 is added to 9)
10 + 1 = 11
72 + 11 = 83
Pattern: Keep adding 1 to the previous added number from left to right.
(c)
186 - 181 = 5
181 - 174 = 7
174 - 9 = 165
165 - 9 = 156
Pattern: Keep subtracting 2 from the previous subtracted number from right to left.
Answer(s): (a) 379; (b) 83; (c) 165
