Complete the following number patterns.
- 768, 706, 644, , 520
- 41, 48, 56, 65, .
- 169, , 184, 189, 192
(a)
768 - 706 = 62
706 - 644 = 62
644 - 62 = 582
Pattern: Keep subtracting 62 from left to right.
(b)
48 - 41 = 7
56 - 48 = 8 (1 is added to 7)
65 - 56 = 9 (1 is added to 8)
9 + 1 = 10
65 + 10 = 75
Pattern: Keep adding 1 to the previous added number from left to right.
(c)
192 - 189 = 3
189 - 184 = 5
184 - 7 = 177
177 - 8 = 169
Pattern: Keep subtracting 2 from the previous subtracted number from right to left.
Answer(s): (a) 582; (b) 75; (c) 177
