hard Set 34 Form Exercise

Number Chain: 2 → -1 → -1 → +7 → +12 → +8 → ?

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Answer: 27

SubType
number-chain
Start
2
Steps
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
  • {"op":"+","operand":7}
  • {"op":"+","operand":12}
  • {"op":"+","operand":8}
Difficulty
hard

Number Chain: 4 → x3 → +9 → -6 → -7 → +4 → ?

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Answer: 12

SubType
number-chain
Start
4
Steps
  • {"op":"x","operand":3}
  • {"op":"+","operand":9}
  • {"op":"-","operand":6}
  • {"op":"-","operand":7}
  • {"op":"+","operand":4}
Difficulty
hard

Number Chain: 11 → x2 → +2 → -22 → -1 → +11 → ?

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Answer: 12

SubType
number-chain
Start
11
Steps
  • {"op":"x","operand":2}
  • {"op":"+","operand":2}
  • {"op":"-","operand":22}
  • {"op":"-","operand":1}
  • {"op":"+","operand":11}
Difficulty
hard

Number Chain: 11 → +2 → +9 → +3 → x5 → +7 → ?

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Answer: 132

SubType
number-chain
Start
11
Steps
  • {"op":"+","operand":2}
  • {"op":"+","operand":9}
  • {"op":"+","operand":3}
  • {"op":"x","operand":5}
  • {"op":"+","operand":7}
Difficulty
hard

Number Chain: 4 → x3 → -5 → +4 → x4 → +6 → ?

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Answer: 50

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

Number Chain: 2 → x2 → -1 → x5 → +11 → -6 → ?

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Answer: 20

SubType
number-chain
Start
2
Steps
  • {"op":"x","operand":2}
  • {"op":"-","operand":1}
  • {"op":"x","operand":5}
  • {"op":"+","operand":11}
  • {"op":"-","operand":6}
Difficulty
hard

Number Chain: 5 → x2 → +2 → -11 → -1 → x2 → ?

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

Number Chain: 9 → +12 → x2 → +8 → +2 → +11 → ?

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Answer: 63

SubType
number-chain
Start
9
Steps
  • {"op":"+","operand":12}
  • {"op":"x","operand":2}
  • {"op":"+","operand":8}
  • {"op":"+","operand":2}
  • {"op":"+","operand":11}
Difficulty
hard