easy Set 37 Form Exercise

Number Chain: 8 → +9 → -1 → +5 → ?

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Answer: 21

SubType
number-chain
Start
8
Steps
  • {"op":"+","operand":9}
  • {"op":"-","operand":1}
  • {"op":"+","operand":5}
Difficulty
easy

Number Chain: 8 → -7 → +9 → -5 → ?

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Answer: 5

SubType
number-chain
Start
8
Steps
  • {"op":"-","operand":7}
  • {"op":"+","operand":9}
  • {"op":"-","operand":5}
Difficulty
easy

Number Chain: 3 → -2 → -1 → -1 → ?

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Answer: -1

SubType
number-chain
Start
3
Steps
  • {"op":"-","operand":2}
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
Difficulty
easy

Number Chain: 1 → -1 → -1 → -1 → ?

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Answer: -2

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

Number Chain: 10 → -9 → +7 → +10 → ?

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Answer: 18

SubType
number-chain
Start
10
Steps
  • {"op":"-","operand":9}
  • {"op":"+","operand":7}
  • {"op":"+","operand":10}
Difficulty
easy

Number Chain: 1 → -1 → -1 → +7 → ?

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Answer: 6

SubType
number-chain
Start
1
Steps
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
  • {"op":"+","operand":7}
Difficulty
easy

Number Chain: 8 → +10 → -17 → -1 → ?

SubType
number-chain
Start
8
Steps
  • {"op":"+","operand":10}
  • {"op":"-","operand":17}
  • {"op":"-","operand":1}
Difficulty
easy

Number Chain: 10 → +3 → +10 → -1 → ?

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Answer: 22

SubType
number-chain
Start
10
Steps
  • {"op":"+","operand":3}
  • {"op":"+","operand":10}
  • {"op":"-","operand":1}
Difficulty
easy