medium Set 63 Form Exercise

Number Chain: 9 → +8 → +5 → -6 → x4 → ?

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Answer: 64

SubType
number-chain
Start
9
Steps
  • {"op":"+","operand":8}
  • {"op":"+","operand":5}
  • {"op":"-","operand":6}
  • {"op":"x","operand":4}
Difficulty
medium

Number Chain: 3 → +2 → +4 → -6 → +5 → ?

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Answer: 8

SubType
number-chain
Start
3
Steps
  • {"op":"+","operand":2}
  • {"op":"+","operand":4}
  • {"op":"-","operand":6}
  • {"op":"+","operand":5}
Difficulty
medium

Number Chain: 7 → +1 → x2 → -15 → x3 → ?

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Answer: 3

SubType
number-chain
Start
7
Steps
  • {"op":"+","operand":1}
  • {"op":"x","operand":2}
  • {"op":"-","operand":15}
  • {"op":"x","operand":3}
Difficulty
medium

Number Chain: 9 → x5 → +6 → +10 → x5 → ?

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Answer: 305

SubType
number-chain
Start
9
Steps
  • {"op":"x","operand":5}
  • {"op":"+","operand":6}
  • {"op":"+","operand":10}
  • {"op":"x","operand":5}
Difficulty
medium

Number Chain: 2 → x2 → +2 → x5 → x4 → ?

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Answer: 120

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

Number Chain: 6 → -1 → +8 → -7 → x3 → ?

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Answer: 18

SubType
number-chain
Start
6
Steps
  • {"op":"-","operand":1}
  • {"op":"+","operand":8}
  • {"op":"-","operand":7}
  • {"op":"x","operand":3}
Difficulty
medium

Number Chain: 6 → +2 → x4 → -6 → x5 → ?

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Answer: 130

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

Number Chain: 9 → +5 → -9 → -2 → -2 → ?

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Answer: 1

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