hard Set 73 Form Exercise

Number Chain: 6 → -1 → -3 → x3 → +8 → x5 → ?

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Answer: 70

SubType
number-chain
Start
6
Steps
  • {"op":"-","operand":1}
  • {"op":"-","operand":3}
  • {"op":"x","operand":3}
  • {"op":"+","operand":8}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 2 → -1 → +3 → +12 → x5 → -11 → ?

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Answer: 69

SubType
number-chain
Start
2
Steps
  • {"op":"-","operand":1}
  • {"op":"+","operand":3}
  • {"op":"+","operand":12}
  • {"op":"x","operand":5}
  • {"op":"-","operand":11}
Difficulty
hard

Number Chain: 6 → -4 → -1 → x5 → +4 → x2 → ?

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Answer: 18

SubType
number-chain
Start
6
Steps
  • {"op":"-","operand":4}
  • {"op":"-","operand":1}
  • {"op":"x","operand":5}
  • {"op":"+","operand":4}
  • {"op":"x","operand":2}
Difficulty
hard

Number Chain: 8 → +10 → +5 → +7 → x5 → -78 → ?

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Answer: 72

SubType
number-chain
Start
8
Steps
  • {"op":"+","operand":10}
  • {"op":"+","operand":5}
  • {"op":"+","operand":7}
  • {"op":"x","operand":5}
  • {"op":"-","operand":78}
Difficulty
hard

Number Chain: 8 → x2 → +9 → -21 → -2 → -1 → ?

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Answer: 1

SubType
number-chain
Start
8
Steps
  • {"op":"x","operand":2}
  • {"op":"+","operand":9}
  • {"op":"-","operand":21}
  • {"op":"-","operand":2}
  • {"op":"-","operand":1}
Difficulty
hard

Number Chain: 8 → -1 → x5 → -32 → +9 → -9 → ?

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Answer: 3

SubType
number-chain
Start
8
Steps
  • {"op":"-","operand":1}
  • {"op":"x","operand":5}
  • {"op":"-","operand":32}
  • {"op":"+","operand":9}
  • {"op":"-","operand":9}
Difficulty
hard

Number Chain: 3 → x4 → -8 → +4 → x2 → +7 → ?

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Answer: 23

SubType
number-chain
Start
3
Steps
  • {"op":"x","operand":4}
  • {"op":"-","operand":8}
  • {"op":"+","operand":4}
  • {"op":"x","operand":2}
  • {"op":"+","operand":7}
Difficulty
hard

Number Chain: 12 → -3 → x2 → -8 → +7 → -12 → ?

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Answer: 5

SubType
number-chain
Start
12
Steps
  • {"op":"-","operand":3}
  • {"op":"x","operand":2}
  • {"op":"-","operand":8}
  • {"op":"+","operand":7}
  • {"op":"-","operand":12}
Difficulty
hard