hard Set 51 Form Exercise

Number Chain: 7 → -2 → x2 → x2 → x4 → -48 → ?

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Answer: 32

SubType
number-chain
Start
7
Steps
  • {"op":"-","operand":2}
  • {"op":"x","operand":2}
  • {"op":"x","operand":2}
  • {"op":"x","operand":4}
  • {"op":"-","operand":48}
Difficulty
hard

Number Chain: 8 → -6 → x2 → -2 → +4 → +5 → ?

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Answer: 11

SubType
number-chain
Start
8
Steps
  • {"op":"-","operand":6}
  • {"op":"x","operand":2}
  • {"op":"-","operand":2}
  • {"op":"+","operand":4}
  • {"op":"+","operand":5}
Difficulty
hard

Number Chain: 11 → +10 → x2 → -14 → x4 → -48 → ?

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Answer: 64

SubType
number-chain
Start
11
Steps
  • {"op":"+","operand":10}
  • {"op":"x","operand":2}
  • {"op":"-","operand":14}
  • {"op":"x","operand":4}
  • {"op":"-","operand":48}
Difficulty
hard

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

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Answer: 38

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

Number Chain: 5 → x3 → -12 → +7 → +8 → +11 → ?

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Answer: 29

SubType
number-chain
Start
5
Steps
  • {"op":"x","operand":3}
  • {"op":"-","operand":12}
  • {"op":"+","operand":7}
  • {"op":"+","operand":8}
  • {"op":"+","operand":11}
Difficulty
hard

Number Chain: 1 → +9 → -2 → x4 → +6 → -9 → ?

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Answer: 29

SubType
number-chain
Start
1
Steps
  • {"op":"+","operand":9}
  • {"op":"-","operand":2}
  • {"op":"x","operand":4}
  • {"op":"+","operand":6}
  • {"op":"-","operand":9}
Difficulty
hard

Number Chain: 4 → x5 → -12 → +1 → x4 → +3 → ?

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Answer: 39

SubType
number-chain
Start
4
Steps
  • {"op":"x","operand":5}
  • {"op":"-","operand":12}
  • {"op":"+","operand":1}
  • {"op":"x","operand":4}
  • {"op":"+","operand":3}
Difficulty
hard

Number Chain: 9 → -3 → x5 → x4 → +1 → x3 → ?

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Answer: 363

SubType
number-chain
Start
9
Steps
  • {"op":"-","operand":3}
  • {"op":"x","operand":5}
  • {"op":"x","operand":4}
  • {"op":"+","operand":1}
  • {"op":"x","operand":3}
Difficulty
hard