81.
One term in the number series is wrong. Find out the wrong term.
6, 15, 35, 77, 165, 221

82.
One term in the number series is wrong. Find out the wrong term.
8, 13, 21, 32, 47, 63, 83

83.
One term in the number series is wrong. Find out the wrong term.
1, 2, 4, 8, 16, 32, 64, 96

84.
One term in the number series is wrong. Find out the wrong term.
3, 4, 10, 32, 136, 685, 4116

85.
One term in the number series is wrong. Find out the wrong term.
105, 85, 60, 30, 0, - 45, - 90

86.
One term in the number series is wrong. Find out the wrong term.
2, 5, 10, 17, 26, 37, 50, 64

87.
One term in the number series is wrong. Find out the wrong term.
125, 126, 124, 127, 123, 129

88.
One term in the number series is wrong. Find out the wrong term.
2, 5, 10, 50, 500, 5000

89.
One term in the number series is wrong. Find out the wrong term.
1, 3, 12, 25, 48

90.
One term in the number series is wrong. Find out the wrong term.
15, 16, 22, 29, 45, 70

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