hard Set 84 Form Exercise

Number Chain: 2 → x3 → x3 → x2 → -20 → -11 → ?

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Answer: 5

SubType
number-chain
Start
2
Steps
  • {"op":"x","operand":3}
  • {"op":"x","operand":3}
  • {"op":"x","operand":2}
  • {"op":"-","operand":20}
  • {"op":"-","operand":11}
Difficulty
hard

Number Chain: 6 → x3 → x2 → x4 → +12 → x4 → ?

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Answer: 624

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

Number Chain: 4 → +2 → -4 → x5 → -4 → -1 → ?

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Answer: 5

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

Number Chain: 7 → -5 → +9 → x4 → -10 → -27 → ?

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Answer: 7

SubType
number-chain
Start
7
Steps
  • {"op":"-","operand":5}
  • {"op":"+","operand":9}
  • {"op":"x","operand":4}
  • {"op":"-","operand":10}
  • {"op":"-","operand":27}
Difficulty
hard

Number Chain: 11 → x3 → x4 → -79 → +11 → +3 → ?

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Answer: 67

SubType
number-chain
Start
11
Steps
  • {"op":"x","operand":3}
  • {"op":"x","operand":4}
  • {"op":"-","operand":79}
  • {"op":"+","operand":11}
  • {"op":"+","operand":3}
Difficulty
hard

Number Chain: 1 → -1 → -1 → -1 → x3 → x5 → ?

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Answer: -30

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

Number Chain: 6 → +5 → -2 → x5 → -40 → -1 → ?

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Answer: 4

SubType
number-chain
Start
6
Steps
  • {"op":"+","operand":5}
  • {"op":"-","operand":2}
  • {"op":"x","operand":5}
  • {"op":"-","operand":40}
  • {"op":"-","operand":1}
Difficulty
hard

Number Chain: 11 → -5 → x2 → x3 → x4 → +12 → ?

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Answer: 156

SubType
number-chain
Start
11
Steps
  • {"op":"-","operand":5}
  • {"op":"x","operand":2}
  • {"op":"x","operand":3}
  • {"op":"x","operand":4}
  • {"op":"+","operand":12}
Difficulty
hard