hard Set 33 Form Exercise

Number Chain: 12 → +7 → -1 → -8 → -6 → -1 → ?

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Answer: 3

SubType
number-chain
Start
12
Steps
  • {"op":"+","operand":7}
  • {"op":"-","operand":1}
  • {"op":"-","operand":8}
  • {"op":"-","operand":6}
  • {"op":"-","operand":1}
Difficulty
hard

Number Chain: 11 → x2 → x4 → +12 → -74 → -23 → ?

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Answer: 3

SubType
number-chain
Start
11
Steps
  • {"op":"x","operand":2}
  • {"op":"x","operand":4}
  • {"op":"+","operand":12}
  • {"op":"-","operand":74}
  • {"op":"-","operand":23}
Difficulty
hard

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

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Answer: 3

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

Number Chain: 10 → -1 → x3 → x3 → x2 → -11 → ?

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Answer: 151

SubType
number-chain
Start
10
Steps
  • {"op":"-","operand":1}
  • {"op":"x","operand":3}
  • {"op":"x","operand":3}
  • {"op":"x","operand":2}
  • {"op":"-","operand":11}
Difficulty
hard

Number Chain: 11 → -2 → +3 → x3 → +3 → -22 → ?

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Answer: 17

SubType
number-chain
Start
11
Steps
  • {"op":"-","operand":2}
  • {"op":"+","operand":3}
  • {"op":"x","operand":3}
  • {"op":"+","operand":3}
  • {"op":"-","operand":22}
Difficulty
hard

Number Chain: 8 → -7 → -1 → +5 → +8 → +10 → ?

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Answer: 23

SubType
number-chain
Start
8
Steps
  • {"op":"-","operand":7}
  • {"op":"-","operand":1}
  • {"op":"+","operand":5}
  • {"op":"+","operand":8}
  • {"op":"+","operand":10}
Difficulty
hard

Number Chain: 5 → +9 → x2 → +2 → x4 → +1 → ?

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Answer: 121

SubType
number-chain
Start
5
Steps
  • {"op":"+","operand":9}
  • {"op":"x","operand":2}
  • {"op":"+","operand":2}
  • {"op":"x","operand":4}
  • {"op":"+","operand":1}
Difficulty
hard

Number Chain: 2 → +5 → -3 → +12 → +1 → +11 → ?

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Answer: 28

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