hard Set 54 Form Exercise

Number Chain: 11 → -1 → -7 → -1 → x2 → x3 → ?

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Answer: 12

SubType
number-chain
Start
11
Steps
  • {"op":"-","operand":1}
  • {"op":"-","operand":7}
  • {"op":"-","operand":1}
  • {"op":"x","operand":2}
  • {"op":"x","operand":3}
Difficulty
hard

Number Chain: 3 → x4 → x2 → -12 → +6 → +11 → ?

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Answer: 29

SubType
number-chain
Start
3
Steps
  • {"op":"x","operand":4}
  • {"op":"x","operand":2}
  • {"op":"-","operand":12}
  • {"op":"+","operand":6}
  • {"op":"+","operand":11}
Difficulty
hard

Number Chain: 11 → x3 → -21 → x4 → -41 → +11 → ?

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Answer: 18

SubType
number-chain
Start
11
Steps
  • {"op":"x","operand":3}
  • {"op":"-","operand":21}
  • {"op":"x","operand":4}
  • {"op":"-","operand":41}
  • {"op":"+","operand":11}
Difficulty
hard

Number Chain: 1 → x5 → -1 → x4 → x2 → -15 → ?

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Answer: 17

SubType
number-chain
Start
1
Steps
  • {"op":"x","operand":5}
  • {"op":"-","operand":1}
  • {"op":"x","operand":4}
  • {"op":"x","operand":2}
  • {"op":"-","operand":15}
Difficulty
hard

Number Chain: 12 → x2 → +5 → -17 → +3 → x5 → ?

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Answer: 75

SubType
number-chain
Start
12
Steps
  • {"op":"x","operand":2}
  • {"op":"+","operand":5}
  • {"op":"-","operand":17}
  • {"op":"+","operand":3}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 11 → +5 → -15 → -1 → +11 → x3 → ?

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Answer: 33

SubType
number-chain
Start
11
Steps
  • {"op":"+","operand":5}
  • {"op":"-","operand":15}
  • {"op":"-","operand":1}
  • {"op":"+","operand":11}
  • {"op":"x","operand":3}
Difficulty
hard

Number Chain: 4 → +4 → x2 → -14 → +11 → -10 → ?

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Answer: 3

SubType
number-chain
Start
4
Steps
  • {"op":"+","operand":4}
  • {"op":"x","operand":2}
  • {"op":"-","operand":14}
  • {"op":"+","operand":11}
  • {"op":"-","operand":10}
Difficulty
hard

Number Chain: 3 → x2 → -5 → -1 → -1 → -1 → ?

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Answer: -2

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