Complete the following number patterns.
- 683, 589, 495, , 307
- 49, 55, 62, 70, .
- 111, , 125, 130, 133
(a)
683 - 589 = 94
589 - 495 = 94
495 - 94 = 401
Pattern: Keep subtracting 94 from left to right.
(b)
55 - 49 = 6
62 - 55 = 7 (1 is added to 6)
70 - 62 = 8 (1 is added to 7)
8 + 1 = 9
70 + 9 = 79
Pattern: Keep adding 1 to the previous added number from left to right.
(c)
133 - 130 = 3
130 - 125 = 5
125 - 7 = 118
118 - 7 = 111
Pattern: Keep subtracting 2 from the previous subtracted number from right to left.
Answer(s): (a) 401; (b) 79; (c) 118
