medium Set 26 Form Exercise

Number Chain: 8 → +9 → -4 → +1 → +2 → ?

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Answer: 16

SubType
number-chain
Start
8
Steps
  • {"op":"+","operand":9}
  • {"op":"-","operand":4}
  • {"op":"+","operand":1}
  • {"op":"+","operand":2}
Difficulty
medium

Number Chain: 2 → +5 → -3 → x4 → x3 → ?

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Answer: 48

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

Number Chain: 4 → -3 → x2 → x5 → -5 → ?

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Answer: 5

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

Number Chain: 2 → -1 → +8 → -7 → x2 → ?

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Answer: 4

SubType
number-chain
Start
2
Steps
  • {"op":"-","operand":1}
  • {"op":"+","operand":8}
  • {"op":"-","operand":7}
  • {"op":"x","operand":2}
Difficulty
medium

Number Chain: 3 → x5 → +10 → x4 → -32 → ?

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Answer: 68

SubType
number-chain
Start
3
Steps
  • {"op":"x","operand":5}
  • {"op":"+","operand":10}
  • {"op":"x","operand":4}
  • {"op":"-","operand":32}
Difficulty
medium

Number Chain: 6 → x4 → x2 → x3 → x5 → ?

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Answer: 720

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

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

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Answer: 12

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

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

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Answer: 4

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