easy Set 89 Form Exercise

Number Chain: 7 → +3 → -5 → -2 → ?

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Answer: 3

SubType
number-chain
Start
7
Steps
  • {"op":"+","operand":3}
  • {"op":"-","operand":5}
  • {"op":"-","operand":2}
Difficulty
easy

Number Chain: 1 → +8 → -8 → -1 → ?

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

Number Chain: 9 → -5 → -1 → -2 → ?

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Answer: 1

SubType
number-chain
Start
9
Steps
  • {"op":"-","operand":5}
  • {"op":"-","operand":1}
  • {"op":"-","operand":2}
Difficulty
easy

Number Chain: 7 → +1 → -6 → +3 → ?

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Answer: 5

SubType
number-chain
Start
7
Steps
  • {"op":"+","operand":1}
  • {"op":"-","operand":6}
  • {"op":"+","operand":3}
Difficulty
easy

Number Chain: 2 → -1 → -1 → +4 → ?

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Answer: 4

SubType
number-chain
Start
2
Steps
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
  • {"op":"+","operand":4}
Difficulty
easy

Number Chain: 9 → +3 → -1 → +10 → ?

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Answer: 21

SubType
number-chain
Start
9
Steps
  • {"op":"+","operand":3}
  • {"op":"-","operand":1}
  • {"op":"+","operand":10}
Difficulty
easy

Number Chain: 2 → +8 → +5 → +6 → ?

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Answer: 21

SubType
number-chain
Start
2
Steps
  • {"op":"+","operand":8}
  • {"op":"+","operand":5}
  • {"op":"+","operand":6}
Difficulty
easy

Number Chain: 9 → +9 → +3 → -6 → ?

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Answer: 15

SubType
number-chain
Start
9
Steps
  • {"op":"+","operand":9}
  • {"op":"+","operand":3}
  • {"op":"-","operand":6}
Difficulty
easy