hard Set 91 Form Exercise

Number Chain: 7 → x3 → x2 → +12 → -5 → +3 → ?

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Answer: 52

SubType
number-chain
Start
7
Steps
  • {"op":"x","operand":3}
  • {"op":"x","operand":2}
  • {"op":"+","operand":12}
  • {"op":"-","operand":5}
  • {"op":"+","operand":3}
Difficulty
hard

Number Chain: 1 → -1 → +8 → -7 → x3 → +4 → ?

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Answer: 7

SubType
number-chain
Start
1
Steps
  • {"op":"-","operand":1}
  • {"op":"+","operand":8}
  • {"op":"-","operand":7}
  • {"op":"x","operand":3}
  • {"op":"+","operand":4}
Difficulty
hard

Number Chain: 8 → +2 → -7 → -1 → -1 → x4 → ?

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Answer: 4

SubType
number-chain
Start
8
Steps
  • {"op":"+","operand":2}
  • {"op":"-","operand":7}
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
  • {"op":"x","operand":4}
Difficulty
hard

Number Chain: 5 → x4 → x5 → x3 → +2 → +5 → ?

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Answer: 307

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

Number Chain: 3 → +3 → -3 → x2 → -2 → -3 → ?

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Answer: 1

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

Number Chain: 8 → x3 → x2 → +8 → -37 → x5 → ?

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Answer: 95

SubType
number-chain
Start
8
Steps
  • {"op":"x","operand":3}
  • {"op":"x","operand":2}
  • {"op":"+","operand":8}
  • {"op":"-","operand":37}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 4 → x4 → -11 → x4 → x3 → +8 → ?

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Answer: 68

SubType
number-chain
Start
4
Steps
  • {"op":"x","operand":4}
  • {"op":"-","operand":11}
  • {"op":"x","operand":4}
  • {"op":"x","operand":3}
  • {"op":"+","operand":8}
Difficulty
hard

Number Chain: 12 → x5 → -3 → x5 → +6 → -23 → ?

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Answer: 268

SubType
number-chain
Start
12
Steps
  • {"op":"x","operand":5}
  • {"op":"-","operand":3}
  • {"op":"x","operand":5}
  • {"op":"+","operand":6}
  • {"op":"-","operand":23}
Difficulty
hard