Complete the following number patterns.
- 808, 713, 618, , 428
- 49, 57, 66, 76, .
- 83, , 100, 106, 110
(a)
808 - 713 = 95
713 - 618 = 95
618 - 95 = 523
Pattern: Keep subtracting 95 from left to right.
(b)
57 - 49 = 8
66 - 57 = 9 (1 is added to 8)
76 - 66 = 10 (1 is added to 9)
10 + 1 = 11
76 + 11 = 87
Pattern: Keep adding 1 to the previous added number from left to right.
(c)
110 - 106 = 4
106 - 100 = 6
100 - 8 = 92
92 - 9 = 83
Pattern: Keep subtracting 2 from the previous subtracted number from right to left.
Answer(s): (a) 523; (b) 87; (c) 92
