Complete the following number patterns.
- 792, 698, 604, , 416
- 20, 25, 31, 38, .
- 170, , 182, 186, 188
(a)
792 - 698 = 94
698 - 604 = 94
604 - 94 = 510
Pattern: Keep subtracting 94 from left to right.
(b)
25 - 20 = 5
31 - 25 = 6 (1 is added to 5)
38 - 31 = 7 (1 is added to 6)
7 + 1 = 8
38 + 8 = 46
Pattern: Keep adding 1 to the previous added number from left to right.
(c)
188 - 186 = 2
186 - 182 = 4
182 - 6 = 176
176 - 6 = 170
Pattern: Keep subtracting 2 from the previous subtracted number from right to left.
Answer(s): (a) 510; (b) 46; (c) 176
