Complete the following number patterns.
- 762, 707, 652, , 542
- 25, 35, 46, 58, .
- 54, , 71, 75, 77
(a)
762 - 707 = 55
707 - 652 = 55
652 - 55 = 597
Pattern: Keep subtracting 55 from left to right.
(b)
35 - 25 = 10
46 - 35 = 11 (1 is added to 10)
58 - 46 = 12 (1 is added to 11)
12 + 1 = 13
58 + 13 = 71
Pattern: Keep adding 1 to the previous added number from left to right.
(c)
77 - 75 = 2
75 - 71 = 4
71 - 6 = 65
65 - 11 = 54
Pattern: Keep subtracting 2 from the previous subtracted number from right to left.
Answer(s): (a) 597; (b) 71; (c) 65
