hard Set 17 Form Exercise

Number Chain: 1 → x2 → +7 → -3 → -2 → x5 → ?

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Answer: 20

SubType
number-chain
Start
1
Steps
  • {"op":"x","operand":2}
  • {"op":"+","operand":7}
  • {"op":"-","operand":3}
  • {"op":"-","operand":2}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 6 → x2 → x4 → -14 → x3 → x5 → ?

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Answer: 510

SubType
number-chain
Start
6
Steps
  • {"op":"x","operand":2}
  • {"op":"x","operand":4}
  • {"op":"-","operand":14}
  • {"op":"x","operand":3}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 5 → -4 → -1 → +6 → x2 → -9 → ?

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Answer: 3

SubType
number-chain
Start
5
Steps
  • {"op":"-","operand":4}
  • {"op":"-","operand":1}
  • {"op":"+","operand":6}
  • {"op":"x","operand":2}
  • {"op":"-","operand":9}
Difficulty
hard

Number Chain: 2 → -1 → +11 → -7 → -4 → +7 → ?

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Answer: 8

SubType
number-chain
Start
2
Steps
  • {"op":"-","operand":1}
  • {"op":"+","operand":11}
  • {"op":"-","operand":7}
  • {"op":"-","operand":4}
  • {"op":"+","operand":7}
Difficulty
hard

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

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Answer: 40

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

Number Chain: 6 → -2 → -3 → x4 → x2 → -3 → ?

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Answer: 5

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

Number Chain: 6 → -2 → x2 → +2 → +3 → +11 → ?

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Answer: 24

SubType
number-chain
Start
6
Steps
  • {"op":"-","operand":2}
  • {"op":"x","operand":2}
  • {"op":"+","operand":2}
  • {"op":"+","operand":3}
  • {"op":"+","operand":11}
Difficulty
hard

Number Chain: 2 → +2 → -3 → x2 → x3 → +6 → ?

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Answer: 12

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