Complete the following number patterns.
- 946, 866, 786, , 626
- 35, 43, 52, 62, .
- 143, , 160, 166, 170
(a)
946 - 866 = 80
866 - 786 = 80
786 - 80 = 706
Pattern: Keep subtracting 80 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)
170 - 166 = 4
166 - 160 = 6
160 - 8 = 152
152 - 9 = 143
Pattern: Keep subtracting 2 from the previous subtracted number from right to left.
Answer(s): (a) 706; (b) 73; (c) 152
