Complete the following number patterns.
- 911, 834, 757, , 603
- 35, 43, 52, 62, .
- 165, , 183, 190, 195
(a)
911 - 834 = 77
834 - 757 = 77
757 - 77 = 680
Pattern: Keep subtracting 77 from left to right.
(b)
43 - 35 = 8
52 - 43 = 9 (1 is added to 8)
62 - 52 = 10 (1 is added to 9)
10 + 1 = 11
62 + 11 = 73
Pattern: Keep adding 1 to the previous added number from left to right.
(c)
195 - 190 = 5
190 - 183 = 7
183 - 9 = 174
174 - 9 = 165
Pattern: Keep subtracting 2 from the previous subtracted number from right to left.
Answer(s): (a) 680; (b) 73; (c) 174
