hard Set 19 Form Exercise

Number Chain: 11 → +1 → +7 → +3 → x5 → -12 → ?

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Answer: 98

SubType
number-chain
Start
11
Steps
  • {"op":"+","operand":1}
  • {"op":"+","operand":7}
  • {"op":"+","operand":3}
  • {"op":"x","operand":5}
  • {"op":"-","operand":12}
Difficulty
hard

Number Chain: 10 → +6 → x3 → +9 → x3 → x3 → ?

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Answer: 513

SubType
number-chain
Start
10
Steps
  • {"op":"+","operand":6}
  • {"op":"x","operand":3}
  • {"op":"+","operand":9}
  • {"op":"x","operand":3}
  • {"op":"x","operand":3}
Difficulty
hard

Number Chain: 4 → -1 → -2 → x2 → +7 → x5 → ?

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Answer: 45

SubType
number-chain
Start
4
Steps
  • {"op":"-","operand":1}
  • {"op":"-","operand":2}
  • {"op":"x","operand":2}
  • {"op":"+","operand":7}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 5 → -4 → -1 → +6 → +7 → +11 → ?

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Answer: 24

SubType
number-chain
Start
5
Steps
  • {"op":"-","operand":4}
  • {"op":"-","operand":1}
  • {"op":"+","operand":6}
  • {"op":"+","operand":7}
  • {"op":"+","operand":11}
Difficulty
hard

Number Chain: 9 → +12 → x2 → +2 → -38 → -3 → ?

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Answer: 3

SubType
number-chain
Start
9
Steps
  • {"op":"+","operand":12}
  • {"op":"x","operand":2}
  • {"op":"+","operand":2}
  • {"op":"-","operand":38}
  • {"op":"-","operand":3}
Difficulty
hard

Number Chain: 5 → -2 → -1 → +6 → x2 → +8 → ?

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Answer: 24

SubType
number-chain
Start
5
Steps
  • {"op":"-","operand":2}
  • {"op":"-","operand":1}
  • {"op":"+","operand":6}
  • {"op":"x","operand":2}
  • {"op":"+","operand":8}
Difficulty
hard

Number Chain: 11 → +4 → +2 → +4 → x4 → +8 → ?

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Answer: 92

SubType
number-chain
Start
11
Steps
  • {"op":"+","operand":4}
  • {"op":"+","operand":2}
  • {"op":"+","operand":4}
  • {"op":"x","operand":4}
  • {"op":"+","operand":8}
Difficulty
hard

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

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Answer: 224

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