Complete the following number patterns.
- 828, 772, 716, , 604
- 40, 47, 55, 64, .
- 82, , 96, 100, 102
(a)
828 - 772 = 56
772 - 716 = 56
716 - 56 = 660
Pattern: Keep subtracting 56 from left to right.
(b)
47 - 40 = 7
55 - 47 = 8 (1 is added to 7)
64 - 55 = 9 (1 is added to 8)
9 + 1 = 10
64 + 10 = 74
Pattern: Keep adding 1 to the previous added number from left to right.
(c)
102 - 100 = 2
100 - 96 = 4
96 - 6 = 90
90 - 8 = 82
Pattern: Keep subtracting 2 from the previous subtracted number from right to left.
Answer(s): (a) 660; (b) 74; (c) 90
