hard Set 55 Form Exercise

Number Chain: 2 → +2 → x5 → x3 → -48 → x5 → ?

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Answer: 60

SubType
number-chain
Start
2
Steps
  • {"op":"+","operand":2}
  • {"op":"x","operand":5}
  • {"op":"x","operand":3}
  • {"op":"-","operand":48}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 8 → x3 → x4 → x3 → +1 → x5 → ?

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Answer: 1445

SubType
number-chain
Start
8
Steps
  • {"op":"x","operand":3}
  • {"op":"x","operand":4}
  • {"op":"x","operand":3}
  • {"op":"+","operand":1}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 9 → x5 → +8 → +3 → x2 → -93 → ?

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Answer: 19

SubType
number-chain
Start
9
Steps
  • {"op":"x","operand":5}
  • {"op":"+","operand":8}
  • {"op":"+","operand":3}
  • {"op":"x","operand":2}
  • {"op":"-","operand":93}
Difficulty
hard

Number Chain: 12 → +4 → +6 → -6 → x5 → x5 → ?

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Answer: 400

SubType
number-chain
Start
12
Steps
  • {"op":"+","operand":4}
  • {"op":"+","operand":6}
  • {"op":"-","operand":6}
  • {"op":"x","operand":5}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 12 → -7 → -1 → -1 → -2 → +12 → ?

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Answer: 13

SubType
number-chain
Start
12
Steps
  • {"op":"-","operand":7}
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
  • {"op":"-","operand":2}
  • {"op":"+","operand":12}
Difficulty
hard

Number Chain: 5 → +1 → x2 → x4 → -8 → -9 → ?

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Answer: 31

SubType
number-chain
Start
5
Steps
  • {"op":"+","operand":1}
  • {"op":"x","operand":2}
  • {"op":"x","operand":4}
  • {"op":"-","operand":8}
  • {"op":"-","operand":9}
Difficulty
hard

Number Chain: 11 → -2 → +1 → x5 → -17 → -6 → ?

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Answer: 27

SubType
number-chain
Start
11
Steps
  • {"op":"-","operand":2}
  • {"op":"+","operand":1}
  • {"op":"x","operand":5}
  • {"op":"-","operand":17}
  • {"op":"-","operand":6}
Difficulty
hard

Number Chain: 1 → x2 → +9 → +5 → +5 → x4 → ?

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Answer: 84

SubType
number-chain
Start
1
Steps
  • {"op":"x","operand":2}
  • {"op":"+","operand":9}
  • {"op":"+","operand":5}
  • {"op":"+","operand":5}
  • {"op":"x","operand":4}
Difficulty
hard