easy Set 91 Form Exercise

Number Chain: 9 → -4 → +3 → -1 → ?

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Answer: 7

SubType
number-chain
Start
9
Steps
  • {"op":"-","operand":4}
  • {"op":"+","operand":3}
  • {"op":"-","operand":1}
Difficulty
easy

Number Chain: 8 → -5 → +7 → -8 → ?

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Answer: 2

SubType
number-chain
Start
8
Steps
  • {"op":"-","operand":5}
  • {"op":"+","operand":7}
  • {"op":"-","operand":8}
Difficulty
easy

Number Chain: 2 → +5 → -6 → -1 → ?

SubType
number-chain
Start
2
Steps
  • {"op":"+","operand":5}
  • {"op":"-","operand":6}
  • {"op":"-","operand":1}
Difficulty
easy

Number Chain: 10 → -2 → +2 → -1 → ?

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Answer: 9

SubType
number-chain
Start
10
Steps
  • {"op":"-","operand":2}
  • {"op":"+","operand":2}
  • {"op":"-","operand":1}
Difficulty
easy

Number Chain: 10 → +8 → +5 → +1 → ?

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Answer: 24

SubType
number-chain
Start
10
Steps
  • {"op":"+","operand":8}
  • {"op":"+","operand":5}
  • {"op":"+","operand":1}
Difficulty
easy

Number Chain: 6 → -1 → +1 → +10 → ?

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Answer: 16

SubType
number-chain
Start
6
Steps
  • {"op":"-","operand":1}
  • {"op":"+","operand":1}
  • {"op":"+","operand":10}
Difficulty
easy

Number Chain: 7 → +2 → +7 → -7 → ?

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Answer: 9

SubType
number-chain
Start
7
Steps
  • {"op":"+","operand":2}
  • {"op":"+","operand":7}
  • {"op":"-","operand":7}
Difficulty
easy

Number Chain: 8 → +9 → -7 → +9 → ?

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Answer: 19

SubType
number-chain
Start
8
Steps
  • {"op":"+","operand":9}
  • {"op":"-","operand":7}
  • {"op":"+","operand":9}
Difficulty
easy