medium Set 64 Form Exercise

Number Chain: 6 → x3 → +4 → -15 → x2 → ?

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Answer: 14

SubType
number-chain
Start
6
Steps
  • {"op":"x","operand":3}
  • {"op":"+","operand":4}
  • {"op":"-","operand":15}
  • {"op":"x","operand":2}
Difficulty
medium

Number Chain: 8 → -5 → -1 → x3 → +8 → ?

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Answer: 14

SubType
number-chain
Start
8
Steps
  • {"op":"-","operand":5}
  • {"op":"-","operand":1}
  • {"op":"x","operand":3}
  • {"op":"+","operand":8}
Difficulty
medium

Number Chain: 3 → +1 → +9 → -12 → -1 → ?

SubType
number-chain
Start
3
Steps
  • {"op":"+","operand":1}
  • {"op":"+","operand":9}
  • {"op":"-","operand":12}
  • {"op":"-","operand":1}
Difficulty
medium

Number Chain: 2 → +10 → x3 → x5 → -71 → ?

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Answer: 109

SubType
number-chain
Start
2
Steps
  • {"op":"+","operand":10}
  • {"op":"x","operand":3}
  • {"op":"x","operand":5}
  • {"op":"-","operand":71}
Difficulty
medium

Number Chain: 10 → -9 → +7 → -5 → +7 → ?

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Answer: 10

SubType
number-chain
Start
10
Steps
  • {"op":"-","operand":9}
  • {"op":"+","operand":7}
  • {"op":"-","operand":5}
  • {"op":"+","operand":7}
Difficulty
medium

Number Chain: 5 → +5 → -3 → -6 → -1 → ?

SubType
number-chain
Start
5
Steps
  • {"op":"+","operand":5}
  • {"op":"-","operand":3}
  • {"op":"-","operand":6}
  • {"op":"-","operand":1}
Difficulty
medium

Number Chain: 6 → -1 → +10 → -6 → +4 → ?

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Answer: 13

SubType
number-chain
Start
6
Steps
  • {"op":"-","operand":1}
  • {"op":"+","operand":10}
  • {"op":"-","operand":6}
  • {"op":"+","operand":4}
Difficulty
medium

Number Chain: 4 → +10 → -8 → x3 → x3 → ?

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Answer: 54

SubType
number-chain
Start
4
Steps
  • {"op":"+","operand":10}
  • {"op":"-","operand":8}
  • {"op":"x","operand":3}
  • {"op":"x","operand":3}
Difficulty
medium