medium Set 42 Form Exercise

Number Chain: 8 → -7 → +3 → +7 → x5 → ?

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Answer: 55

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

Number Chain: 9 → -2 → -3 → -3 → -1 → ?

SubType
number-chain
Start
9
Steps
  • {"op":"-","operand":2}
  • {"op":"-","operand":3}
  • {"op":"-","operand":3}
  • {"op":"-","operand":1}
Difficulty
medium

Number Chain: 2 → x5 → -8 → x4 → +4 → ?

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Answer: 12

SubType
number-chain
Start
2
Steps
  • {"op":"x","operand":5}
  • {"op":"-","operand":8}
  • {"op":"x","operand":4}
  • {"op":"+","operand":4}
Difficulty
medium

Number Chain: 5 → +4 → x2 → x5 → x2 → ?

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Answer: 180

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

Number Chain: 1 → x3 → +8 → x4 → -15 → ?

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Answer: 29

SubType
number-chain
Start
1
Steps
  • {"op":"x","operand":3}
  • {"op":"+","operand":8}
  • {"op":"x","operand":4}
  • {"op":"-","operand":15}
Difficulty
medium

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

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Answer: 12

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

Number Chain: 6 → -1 → +10 → x3 → x3 → ?

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Answer: 135

SubType
number-chain
Start
6
Steps
  • {"op":"-","operand":1}
  • {"op":"+","operand":10}
  • {"op":"x","operand":3}
  • {"op":"x","operand":3}
Difficulty
medium

Number Chain: 7 → -2 → x3 → x2 → x2 → ?

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Answer: 60

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