hard Set 59 Form Exercise

Number Chain: 12 → -6 → x3 → x5 → -87 → +6 → ?

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Answer: 9

SubType
number-chain
Start
12
Steps
  • {"op":"-","operand":6}
  • {"op":"x","operand":3}
  • {"op":"x","operand":5}
  • {"op":"-","operand":87}
  • {"op":"+","operand":6}
Difficulty
hard

Number Chain: 3 → -1 → +8 → -3 → x3 → -7 → ?

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Answer: 14

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

Number Chain: 11 → x2 → x5 → -96 → +6 → +8 → ?

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Answer: 28

SubType
number-chain
Start
11
Steps
  • {"op":"x","operand":2}
  • {"op":"x","operand":5}
  • {"op":"-","operand":96}
  • {"op":"+","operand":6}
  • {"op":"+","operand":8}
Difficulty
hard

Number Chain: 2 → -1 → +9 → -2 → x2 → x2 → ?

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Answer: 32

SubType
number-chain
Start
2
Steps
  • {"op":"-","operand":1}
  • {"op":"+","operand":9}
  • {"op":"-","operand":2}
  • {"op":"x","operand":2}
  • {"op":"x","operand":2}
Difficulty
hard

Number Chain: 5 → x2 → -4 → +1 → x4 → -7 → ?

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Answer: 21

SubType
number-chain
Start
5
Steps
  • {"op":"x","operand":2}
  • {"op":"-","operand":4}
  • {"op":"+","operand":1}
  • {"op":"x","operand":4}
  • {"op":"-","operand":7}
Difficulty
hard

Number Chain: 1 → +4 → -4 → x4 → -2 → -1 → ?

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Answer: 1

SubType
number-chain
Start
1
Steps
  • {"op":"+","operand":4}
  • {"op":"-","operand":4}
  • {"op":"x","operand":4}
  • {"op":"-","operand":2}
  • {"op":"-","operand":1}
Difficulty
hard

Number Chain: 12 → -3 → x2 → x3 → +4 → x5 → ?

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Answer: 290

SubType
number-chain
Start
12
Steps
  • {"op":"-","operand":3}
  • {"op":"x","operand":2}
  • {"op":"x","operand":3}
  • {"op":"+","operand":4}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 9 → x2 → x3 → -4 → -14 → -1 → ?

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Answer: 35

SubType
number-chain
Start
9
Steps
  • {"op":"x","operand":2}
  • {"op":"x","operand":3}
  • {"op":"-","operand":4}
  • {"op":"-","operand":14}
  • {"op":"-","operand":1}
Difficulty
hard