hard Set 58 Form Exercise

Number Chain: 8 → x4 → x2 → x3 → x5 → -713 → ?

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Answer: 247

SubType
number-chain
Start
8
Steps
  • {"op":"x","operand":4}
  • {"op":"x","operand":2}
  • {"op":"x","operand":3}
  • {"op":"x","operand":5}
  • {"op":"-","operand":713}
Difficulty
hard

Number Chain: 4 → +1 → -3 → +12 → +7 → x3 → ?

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Answer: 63

SubType
number-chain
Start
4
Steps
  • {"op":"+","operand":1}
  • {"op":"-","operand":3}
  • {"op":"+","operand":12}
  • {"op":"+","operand":7}
  • {"op":"x","operand":3}
Difficulty
hard

Number Chain: 9 → -8 → +9 → +12 → -18 → +12 → ?

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Answer: 16

SubType
number-chain
Start
9
Steps
  • {"op":"-","operand":8}
  • {"op":"+","operand":9}
  • {"op":"+","operand":12}
  • {"op":"-","operand":18}
  • {"op":"+","operand":12}
Difficulty
hard

Number Chain: 6 → -4 → -1 → +11 → +12 → -11 → ?

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Answer: 13

SubType
number-chain
Start
6
Steps
  • {"op":"-","operand":4}
  • {"op":"-","operand":1}
  • {"op":"+","operand":11}
  • {"op":"+","operand":12}
  • {"op":"-","operand":11}
Difficulty
hard

Number Chain: 8 → +3 → -4 → -5 → -1 → -1 → ?

SubType
number-chain
Start
8
Steps
  • {"op":"+","operand":3}
  • {"op":"-","operand":4}
  • {"op":"-","operand":5}
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
Difficulty
hard

Number Chain: 3 → x3 → +11 → x5 → -74 → x5 → ?

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Answer: 130

SubType
number-chain
Start
3
Steps
  • {"op":"x","operand":3}
  • {"op":"+","operand":11}
  • {"op":"x","operand":5}
  • {"op":"-","operand":74}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 11 → -2 → x4 → -30 → -5 → +3 → ?

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Answer: 4

SubType
number-chain
Start
11
Steps
  • {"op":"-","operand":2}
  • {"op":"x","operand":4}
  • {"op":"-","operand":30}
  • {"op":"-","operand":5}
  • {"op":"+","operand":3}
Difficulty
hard

Number Chain: 12 → -8 → x2 → +11 → +10 → +5 → ?

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Answer: 34

SubType
number-chain
Start
12
Steps
  • {"op":"-","operand":8}
  • {"op":"x","operand":2}
  • {"op":"+","operand":11}
  • {"op":"+","operand":10}
  • {"op":"+","operand":5}
Difficulty
hard