hard Set 29 Form Exercise

Number Chain: 7 → -2 → x5 → -5 → x4 → -3 → ?

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Answer: 77

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

Number Chain: 12 → -8 → +1 → +9 → x2 → +9 → ?

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Answer: 37

SubType
number-chain
Start
12
Steps
  • {"op":"-","operand":8}
  • {"op":"+","operand":1}
  • {"op":"+","operand":9}
  • {"op":"x","operand":2}
  • {"op":"+","operand":9}
Difficulty
hard

Number Chain: 6 → x3 → x5 → -3 → +7 → +9 → ?

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Answer: 103

SubType
number-chain
Start
6
Steps
  • {"op":"x","operand":3}
  • {"op":"x","operand":5}
  • {"op":"-","operand":3}
  • {"op":"+","operand":7}
  • {"op":"+","operand":9}
Difficulty
hard

Number Chain: 11 → +7 → x2 → x4 → x4 → -92 → ?

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Answer: 484

SubType
number-chain
Start
11
Steps
  • {"op":"+","operand":7}
  • {"op":"x","operand":2}
  • {"op":"x","operand":4}
  • {"op":"x","operand":4}
  • {"op":"-","operand":92}
Difficulty
hard

Number Chain: 5 → +5 → x4 → x4 → -83 → +4 → ?

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Answer: 81

SubType
number-chain
Start
5
Steps
  • {"op":"+","operand":5}
  • {"op":"x","operand":4}
  • {"op":"x","operand":4}
  • {"op":"-","operand":83}
  • {"op":"+","operand":4}
Difficulty
hard

Number Chain: 1 → x4 → x4 → x5 → x5 → x3 → ?

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Answer: 1200

SubType
number-chain
Start
1
Steps
  • {"op":"x","operand":4}
  • {"op":"x","operand":4}
  • {"op":"x","operand":5}
  • {"op":"x","operand":5}
  • {"op":"x","operand":3}
Difficulty
hard

Number Chain: 6 → +7 → +12 → x2 → +4 → x5 → ?

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Answer: 270

SubType
number-chain
Start
6
Steps
  • {"op":"+","operand":7}
  • {"op":"+","operand":12}
  • {"op":"x","operand":2}
  • {"op":"+","operand":4}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 2 → x5 → +5 → -5 → -2 → -6 → ?

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Answer: 2

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