easy Set 12 Form Exercise

Number Chain: 1 → +10 → +1 → +8 → ?

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Answer: 20

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

Number Chain: 2 → -1 → -1 → +2 → ?

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Answer: 2

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

Number Chain: 10 → -9 → -1 → -1 → ?

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Answer: -1

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

Number Chain: 5 → +8 → -8 → -2 → ?

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Answer: 3

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

Number Chain: 4 → +8 → +3 → -10 → ?

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Answer: 5

SubType
number-chain
Start
4
Steps
  • {"op":"+","operand":8}
  • {"op":"+","operand":3}
  • {"op":"-","operand":10}
Difficulty
easy

Number Chain: 2 → -1 → +10 → +6 → ?

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Answer: 17

SubType
number-chain
Start
2
Steps
  • {"op":"-","operand":1}
  • {"op":"+","operand":10}
  • {"op":"+","operand":6}
Difficulty
easy

Number Chain: 10 → +4 → -4 → -1 → ?

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Answer: 9

SubType
number-chain
Start
10
Steps
  • {"op":"+","operand":4}
  • {"op":"-","operand":4}
  • {"op":"-","operand":1}
Difficulty
easy

Number Chain: 7 → +6 → -10 → -2 → ?

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Answer: 1

SubType
number-chain
Start
7
Steps
  • {"op":"+","operand":6}
  • {"op":"-","operand":10}
  • {"op":"-","operand":2}
Difficulty
easy