Complete the following number patterns.
- 953, 856, 759, , 565
- 41, 50, 60, 71, .
- 161, , 180, 187, 192
(a)
953 - 856 = 97
856 - 759 = 97
759 - 97 = 662
Pattern: Keep subtracting 97 from left to right.
(b)
50 - 41 = 9
60 - 50 = 10 (1 is added to 9)
71 - 60 = 11 (1 is added to 10)
11 + 1 = 12
71 + 12 = 83
Pattern: Keep adding 1 to the previous added number from left to right.
(c)
192 - 187 = 5
187 - 180 = 7
180 - 9 = 171
171 - 10 = 161
Pattern: Keep subtracting 2 from the previous subtracted number from right to left.
Answer(s): (a) 662; (b) 83; (c) 171
