medium Set 72 Form Exercise

Number Chain: 4 → -1 → -2 → -1 → -1 → ?

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Answer: -1

SubType
number-chain
Start
4
Steps
  • {"op":"-","operand":1}
  • {"op":"-","operand":2}
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
Difficulty
medium

Number Chain: 9 → +4 → +10 → x5 → +9 → ?

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Answer: 124

SubType
number-chain
Start
9
Steps
  • {"op":"+","operand":4}
  • {"op":"+","operand":10}
  • {"op":"x","operand":5}
  • {"op":"+","operand":9}
Difficulty
medium

Number Chain: 5 → x5 → +4 → x3 → x4 → ?

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Answer: 348

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

Number Chain: 8 → x3 → -23 → x5 → +4 → ?

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Answer: 9

SubType
number-chain
Start
8
Steps
  • {"op":"x","operand":3}
  • {"op":"-","operand":23}
  • {"op":"x","operand":5}
  • {"op":"+","operand":4}
Difficulty
medium

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

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

Number Chain: 9 → +3 → x5 → +2 → +10 → ?

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Answer: 72

SubType
number-chain
Start
9
Steps
  • {"op":"+","operand":3}
  • {"op":"x","operand":5}
  • {"op":"+","operand":2}
  • {"op":"+","operand":10}
Difficulty
medium

Number Chain: 7 → +7 → +6 → -19 → +5 → ?

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Answer: 6

SubType
number-chain
Start
7
Steps
  • {"op":"+","operand":7}
  • {"op":"+","operand":6}
  • {"op":"-","operand":19}
  • {"op":"+","operand":5}
Difficulty
medium

Number Chain: 1 → x3 → -1 → +10 → x2 → ?

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Answer: 24

SubType
number-chain
Start
1
Steps
  • {"op":"x","operand":3}
  • {"op":"-","operand":1}
  • {"op":"+","operand":10}
  • {"op":"x","operand":2}
Difficulty
medium