hard Set 60 Form Exercise

Number Chain: 9 → +10 → x2 → x2 → -47 → x4 → ?

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Answer: 116

SubType
number-chain
Start
9
Steps
  • {"op":"+","operand":10}
  • {"op":"x","operand":2}
  • {"op":"x","operand":2}
  • {"op":"-","operand":47}
  • {"op":"x","operand":4}
Difficulty
hard

Number Chain: 1 → +3 → -3 → +11 → -6 → x5 → ?

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Answer: 30

SubType
number-chain
Start
1
Steps
  • {"op":"+","operand":3}
  • {"op":"-","operand":3}
  • {"op":"+","operand":11}
  • {"op":"-","operand":6}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 4 → x3 → x4 → x3 → +12 → x2 → ?

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Answer: 312

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

Number Chain: 12 → +7 → x4 → -21 → x5 → x3 → ?

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Answer: 825

SubType
number-chain
Start
12
Steps
  • {"op":"+","operand":7}
  • {"op":"x","operand":4}
  • {"op":"-","operand":21}
  • {"op":"x","operand":5}
  • {"op":"x","operand":3}
Difficulty
hard

Number Chain: 3 → +10 → -1 → +3 → +6 → +1 → ?

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Answer: 22

SubType
number-chain
Start
3
Steps
  • {"op":"+","operand":10}
  • {"op":"-","operand":1}
  • {"op":"+","operand":3}
  • {"op":"+","operand":6}
  • {"op":"+","operand":1}
Difficulty
hard

Number Chain: 2 → -1 → x3 → x4 → +3 → +3 → ?

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Answer: 18

SubType
number-chain
Start
2
Steps
  • {"op":"-","operand":1}
  • {"op":"x","operand":3}
  • {"op":"x","operand":4}
  • {"op":"+","operand":3}
  • {"op":"+","operand":3}
Difficulty
hard

Number Chain: 10 → -7 → x4 → -3 → x4 → +12 → ?

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Answer: 48

SubType
number-chain
Start
10
Steps
  • {"op":"-","operand":7}
  • {"op":"x","operand":4}
  • {"op":"-","operand":3}
  • {"op":"x","operand":4}
  • {"op":"+","operand":12}
Difficulty
hard

Number Chain: 4 → x3 → x2 → -16 → x5 → x3 → ?

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Answer: 120

SubType
number-chain
Start
4
Steps
  • {"op":"x","operand":3}
  • {"op":"x","operand":2}
  • {"op":"-","operand":16}
  • {"op":"x","operand":5}
  • {"op":"x","operand":3}
Difficulty
hard