Complete the following number patterns.
- 663, 598, 533, , 403
- 50, 60, 71, 83, .
- 124, , 143, 149, 153
(a)
663 - 598 = 65
598 - 533 = 65
533 - 65 = 468
Pattern: Keep subtracting 65 from left to right.
(b)
60 - 50 = 10
71 - 60 = 11 (1 is added to 10)
83 - 71 = 12 (1 is added to 11)
12 + 1 = 13
83 + 13 = 96
Pattern: Keep adding 1 to the previous added number from left to right.
(c)
153 - 149 = 4
149 - 143 = 6
143 - 8 = 135
135 - 11 = 124
Pattern: Keep subtracting 2 from the previous subtracted number from right to left.
Answer(s): (a) 468; (b) 96; (c) 135
