hard Set 18 Form Exercise

Number Chain: 6 → -3 → +12 → +4 → -14 → +4 → ?

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Answer: 9

SubType
number-chain
Start
6
Steps
  • {"op":"-","operand":3}
  • {"op":"+","operand":12}
  • {"op":"+","operand":4}
  • {"op":"-","operand":14}
  • {"op":"+","operand":4}
Difficulty
hard

Number Chain: 9 → +3 → x4 → +7 → x2 → +4 → ?

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Answer: 114

SubType
number-chain
Start
9
Steps
  • {"op":"+","operand":3}
  • {"op":"x","operand":4}
  • {"op":"+","operand":7}
  • {"op":"x","operand":2}
  • {"op":"+","operand":4}
Difficulty
hard

Number Chain: 11 → -6 → x2 → x4 → -6 → +11 → ?

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Answer: 45

SubType
number-chain
Start
11
Steps
  • {"op":"-","operand":6}
  • {"op":"x","operand":2}
  • {"op":"x","operand":4}
  • {"op":"-","operand":6}
  • {"op":"+","operand":11}
Difficulty
hard

Number Chain: 8 → -5 → x5 → x4 → +12 → -45 → ?

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Answer: 27

SubType
number-chain
Start
8
Steps
  • {"op":"-","operand":5}
  • {"op":"x","operand":5}
  • {"op":"x","operand":4}
  • {"op":"+","operand":12}
  • {"op":"-","operand":45}
Difficulty
hard

Number Chain: 9 → x5 → +10 → x4 → +2 → -152 → ?

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Answer: 70

SubType
number-chain
Start
9
Steps
  • {"op":"x","operand":5}
  • {"op":"+","operand":10}
  • {"op":"x","operand":4}
  • {"op":"+","operand":2}
  • {"op":"-","operand":152}
Difficulty
hard

Number Chain: 4 → x2 → x2 → -7 → +8 → -6 → ?

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Answer: 11

SubType
number-chain
Start
4
Steps
  • {"op":"x","operand":2}
  • {"op":"x","operand":2}
  • {"op":"-","operand":7}
  • {"op":"+","operand":8}
  • {"op":"-","operand":6}
Difficulty
hard

Number Chain: 6 → -4 → +6 → +7 → +6 → +8 → ?

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Answer: 29

SubType
number-chain
Start
6
Steps
  • {"op":"-","operand":4}
  • {"op":"+","operand":6}
  • {"op":"+","operand":7}
  • {"op":"+","operand":6}
  • {"op":"+","operand":8}
Difficulty
hard

Number Chain: 5 → -3 → x3 → +9 → -4 → +9 → ?

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Answer: 20

SubType
number-chain
Start
5
Steps
  • {"op":"-","operand":3}
  • {"op":"x","operand":3}
  • {"op":"+","operand":9}
  • {"op":"-","operand":4}
  • {"op":"+","operand":9}
Difficulty
hard