easy Set 40 Form Exercise

Number Chain: 9 → +10 → +10 → -7 → ?

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Answer: 22

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

Number Chain: 8 → +9 → +2 → -17 → ?

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Answer: 2

SubType
number-chain
Start
8
Steps
  • {"op":"+","operand":9}
  • {"op":"+","operand":2}
  • {"op":"-","operand":17}
Difficulty
easy

Number Chain: 2 → +8 → +2 → -9 → ?

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Answer: 3

SubType
number-chain
Start
2
Steps
  • {"op":"+","operand":8}
  • {"op":"+","operand":2}
  • {"op":"-","operand":9}
Difficulty
easy

Number Chain: 5 → -3 → +2 → -3 → ?

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Answer: 1

SubType
number-chain
Start
5
Steps
  • {"op":"-","operand":3}
  • {"op":"+","operand":2}
  • {"op":"-","operand":3}
Difficulty
easy

Number Chain: 3 → -1 → +1 → -2 → ?

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Answer: 1

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

Number Chain: 10 → +1 → +2 → -8 → ?

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Answer: 5

SubType
number-chain
Start
10
Steps
  • {"op":"+","operand":1}
  • {"op":"+","operand":2}
  • {"op":"-","operand":8}
Difficulty
easy

Number Chain: 8 → -3 → -2 → +8 → ?

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Answer: 11

SubType
number-chain
Start
8
Steps
  • {"op":"-","operand":3}
  • {"op":"-","operand":2}
  • {"op":"+","operand":8}
Difficulty
easy

Number Chain: 5 → +9 → -8 → -2 → ?

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Answer: 4

SubType
number-chain
Start
5
Steps
  • {"op":"+","operand":9}
  • {"op":"-","operand":8}
  • {"op":"-","operand":2}
Difficulty
easy