Find the missing terms in the following number sequences:
1) 5, 6, 8, ___, 15, ___
2)18, 20, 24, ___, 38, ___
3)25, 28, 34, ___, ___, 70
4)55, 54, 51, 46, ___, ___, 19
5)82, 81, 78, ___, 66, ___
1) 5, 6, 8, ___, 15, ___
2)18, 20, 24, ___, 38, ___
3)25, 28, 34, ___, ___, 70
4)55, 54, 51, 46, ___, ___, 19
5)82, 81, 78, ___, 66, ___
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Answer:
1. 5, 6, 8, 11, 15, 20
The pattern is adding 1, 2, 3, 4, 5
2. 18, 20, 24, 30, 38, 40
The pattern is adding 2, 4, 6, 8, 10
3. 25, 28, 34, 43, 55, 70
The pattern is adding 3, 6, 9, 12, 15
4. 55, 54, 51, 46, 39, 30, 19
The pattern is subtracting 1, 3, 5, 7, 9, 11
5. 82, 81, 78, 73, 66, 57
The pattern is subtracting 1, 3, 5, 7, 9