hard Set 11 Form Exercise

Number Chain: 11 → x2 → -20 → +8 → -9 → +1 → ?

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Answer: 2

SubType
number-chain
Start
11
Steps
  • {"op":"x","operand":2}
  • {"op":"-","operand":20}
  • {"op":"+","operand":8}
  • {"op":"-","operand":9}
  • {"op":"+","operand":1}
Difficulty
hard

Number Chain: 7 → +11 → x4 → +3 → +1 → -35 → ?

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Answer: 41

SubType
number-chain
Start
7
Steps
  • {"op":"+","operand":11}
  • {"op":"x","operand":4}
  • {"op":"+","operand":3}
  • {"op":"+","operand":1}
  • {"op":"-","operand":35}
Difficulty
hard

Number Chain: 5 → +8 → x3 → +7 → -17 → -6 → ?

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Answer: 23

SubType
number-chain
Start
5
Steps
  • {"op":"+","operand":8}
  • {"op":"x","operand":3}
  • {"op":"+","operand":7}
  • {"op":"-","operand":17}
  • {"op":"-","operand":6}
Difficulty
hard

Number Chain: 12 → x2 → x3 → +12 → +10 → -58 → ?

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Answer: 36

SubType
number-chain
Start
12
Steps
  • {"op":"x","operand":2}
  • {"op":"x","operand":3}
  • {"op":"+","operand":12}
  • {"op":"+","operand":10}
  • {"op":"-","operand":58}
Difficulty
hard

Number Chain: 12 → -4 → -1 → -2 → +8 → +11 → ?

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Answer: 24

SubType
number-chain
Start
12
Steps
  • {"op":"-","operand":4}
  • {"op":"-","operand":1}
  • {"op":"-","operand":2}
  • {"op":"+","operand":8}
  • {"op":"+","operand":11}
Difficulty
hard

Number Chain: 3 → x5 → x4 → +8 → +9 → +12 → ?

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Answer: 89

SubType
number-chain
Start
3
Steps
  • {"op":"x","operand":5}
  • {"op":"x","operand":4}
  • {"op":"+","operand":8}
  • {"op":"+","operand":9}
  • {"op":"+","operand":12}
Difficulty
hard

Number Chain: 6 → -1 → x3 → -7 → x5 → -4 → ?

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Answer: 36

SubType
number-chain
Start
6
Steps
  • {"op":"-","operand":1}
  • {"op":"x","operand":3}
  • {"op":"-","operand":7}
  • {"op":"x","operand":5}
  • {"op":"-","operand":4}
Difficulty
hard

Number Chain: 4 → -1 → +12 → x2 → +1 → +11 → ?

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Answer: 42

SubType
number-chain
Start
4
Steps
  • {"op":"-","operand":1}
  • {"op":"+","operand":12}
  • {"op":"x","operand":2}
  • {"op":"+","operand":1}
  • {"op":"+","operand":11}
Difficulty
hard