hard Set 31 Form Exercise

Number Chain: 6 → x4 → -23 → x2 → +3 → +6 → ?

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Answer: 11

SubType
number-chain
Start
6
Steps
  • {"op":"x","operand":4}
  • {"op":"-","operand":23}
  • {"op":"x","operand":2}
  • {"op":"+","operand":3}
  • {"op":"+","operand":6}
Difficulty
hard

Number Chain: 9 → x4 → +7 → -40 → x3 → +11 → ?

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Answer: 20

SubType
number-chain
Start
9
Steps
  • {"op":"x","operand":4}
  • {"op":"+","operand":7}
  • {"op":"-","operand":40}
  • {"op":"x","operand":3}
  • {"op":"+","operand":11}
Difficulty
hard

Number Chain: 3 → +12 → -2 → x3 → +3 → +9 → ?

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Answer: 51

SubType
number-chain
Start
3
Steps
  • {"op":"+","operand":12}
  • {"op":"-","operand":2}
  • {"op":"x","operand":3}
  • {"op":"+","operand":3}
  • {"op":"+","operand":9}
Difficulty
hard

Number Chain: 7 → x5 → +8 → x4 → x3 → -205 → ?

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Answer: 311

SubType
number-chain
Start
7
Steps
  • {"op":"x","operand":5}
  • {"op":"+","operand":8}
  • {"op":"x","operand":4}
  • {"op":"x","operand":3}
  • {"op":"-","operand":205}
Difficulty
hard

Number Chain: 3 → x5 → x3 → -13 → x5 → +7 → ?

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Answer: 167

SubType
number-chain
Start
3
Steps
  • {"op":"x","operand":5}
  • {"op":"x","operand":3}
  • {"op":"-","operand":13}
  • {"op":"x","operand":5}
  • {"op":"+","operand":7}
Difficulty
hard

Number Chain: 6 → +11 → x4 → +7 → -35 → +11 → ?

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Answer: 51

SubType
number-chain
Start
6
Steps
  • {"op":"+","operand":11}
  • {"op":"x","operand":4}
  • {"op":"+","operand":7}
  • {"op":"-","operand":35}
  • {"op":"+","operand":11}
Difficulty
hard

Number Chain: 12 → x3 → +5 → -6 → +2 → -21 → ?

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Answer: 16

SubType
number-chain
Start
12
Steps
  • {"op":"x","operand":3}
  • {"op":"+","operand":5}
  • {"op":"-","operand":6}
  • {"op":"+","operand":2}
  • {"op":"-","operand":21}
Difficulty
hard

Number Chain: 9 → x5 → -15 → -5 → -9 → -13 → ?

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Answer: 3

SubType
number-chain
Start
9
Steps
  • {"op":"x","operand":5}
  • {"op":"-","operand":15}
  • {"op":"-","operand":5}
  • {"op":"-","operand":9}
  • {"op":"-","operand":13}
Difficulty
hard