Complete the following number patterns.
- 522, 424, 326, , 130
- 35, 41, 48, 56, .
- 80, , 95, 101, 105
(a)
522 - 424 = 98
424 - 326 = 98
326 - 98 = 228
Pattern: Keep subtracting 98 from left to right.
(b)
41 - 35 = 6
48 - 41 = 7 (1 is added to 6)
56 - 48 = 8 (1 is added to 7)
8 + 1 = 9
56 + 9 = 65
Pattern: Keep adding 1 to the previous added number from left to right.
(c)
105 - 101 = 4
101 - 95 = 6
95 - 8 = 87
87 - 7 = 80
Pattern: Keep subtracting 2 from the previous subtracted number from right to left.
Answer(s): (a) 228; (b) 65; (c) 87
