hard Set 12 Form Exercise

Number Chain: 2 → -1 → -1 → +11 → -2 → +5 → ?

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Answer: 14

SubType
number-chain
Start
2
Steps
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
  • {"op":"+","operand":11}
  • {"op":"-","operand":2}
  • {"op":"+","operand":5}
Difficulty
hard

Number Chain: 2 → -1 → x5 → +9 → +9 → x2 → ?

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Answer: 46

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

Number Chain: 1 → -1 → -1 → +3 → -1 → -1 → ?

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

Number Chain: 6 → +5 → x4 → x3 → -85 → x5 → ?

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Answer: 235

SubType
number-chain
Start
6
Steps
  • {"op":"+","operand":5}
  • {"op":"x","operand":4}
  • {"op":"x","operand":3}
  • {"op":"-","operand":85}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 3 → x4 → -7 → x2 → -5 → +9 → ?

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Answer: 14

SubType
number-chain
Start
3
Steps
  • {"op":"x","operand":4}
  • {"op":"-","operand":7}
  • {"op":"x","operand":2}
  • {"op":"-","operand":5}
  • {"op":"+","operand":9}
Difficulty
hard

Number Chain: 5 → x5 → x4 → x3 → +8 → -135 → ?

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Answer: 173

SubType
number-chain
Start
5
Steps
  • {"op":"x","operand":5}
  • {"op":"x","operand":4}
  • {"op":"x","operand":3}
  • {"op":"+","operand":8}
  • {"op":"-","operand":135}
Difficulty
hard

Number Chain: 7 → x4 → -8 → +3 → +5 → +5 → ?

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Answer: 33

SubType
number-chain
Start
7
Steps
  • {"op":"x","operand":4}
  • {"op":"-","operand":8}
  • {"op":"+","operand":3}
  • {"op":"+","operand":5}
  • {"op":"+","operand":5}
Difficulty
hard

Number Chain: 6 → x3 → x3 → x2 → -92 → +6 → ?

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Answer: 22

SubType
number-chain
Start
6
Steps
  • {"op":"x","operand":3}
  • {"op":"x","operand":3}
  • {"op":"x","operand":2}
  • {"op":"-","operand":92}
  • {"op":"+","operand":6}
Difficulty
hard