hard Set 93 Form Exercise

Number Chain: 12 → -11 → -1 → x2 → -1 → -1 → ?

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Answer: -2

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

Number Chain: 1 → x2 → +3 → +2 → x4 → -26 → ?

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Answer: 2

SubType
number-chain
Start
1
Steps
  • {"op":"x","operand":2}
  • {"op":"+","operand":3}
  • {"op":"+","operand":2}
  • {"op":"x","operand":4}
  • {"op":"-","operand":26}
Difficulty
hard

Number Chain: 2 → +12 → +3 → x3 → x3 → x3 → ?

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Answer: 459

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

Number Chain: 7 → -2 → +5 → +4 → +8 → +1 → ?

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Answer: 23

SubType
number-chain
Start
7
Steps
  • {"op":"-","operand":2}
  • {"op":"+","operand":5}
  • {"op":"+","operand":4}
  • {"op":"+","operand":8}
  • {"op":"+","operand":1}
Difficulty
hard

Number Chain: 11 → +12 → -11 → -7 → x5 → x5 → ?

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Answer: 125

SubType
number-chain
Start
11
Steps
  • {"op":"+","operand":12}
  • {"op":"-","operand":11}
  • {"op":"-","operand":7}
  • {"op":"x","operand":5}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 2 → -1 → -1 → x5 → -1 → x2 → ?

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Answer: -2

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

Number Chain: 12 → -8 → +9 → +10 → -7 → +6 → ?

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Answer: 22

SubType
number-chain
Start
12
Steps
  • {"op":"-","operand":8}
  • {"op":"+","operand":9}
  • {"op":"+","operand":10}
  • {"op":"-","operand":7}
  • {"op":"+","operand":6}
Difficulty
hard

Number Chain: 3 → +2 → -3 → x4 → +1 → -4 → ?

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Answer: 5

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