medium Set 62 Form Exercise

Number Chain: 2 → x5 → x2 → -9 → -10 → ?

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Answer: 1

SubType
number-chain
Start
2
Steps
  • {"op":"x","operand":5}
  • {"op":"x","operand":2}
  • {"op":"-","operand":9}
  • {"op":"-","operand":10}
Difficulty
medium

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

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Answer: 65

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

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

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Answer: 25

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

Number Chain: 7 → x2 → -13 → +4 → +7 → ?

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Answer: 12

SubType
number-chain
Start
7
Steps
  • {"op":"x","operand":2}
  • {"op":"-","operand":13}
  • {"op":"+","operand":4}
  • {"op":"+","operand":7}
Difficulty
medium

Number Chain: 2 → -1 → -1 → -1 → x3 → ?

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Answer: -3

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

Number Chain: 8 → x5 → +9 → +5 → x4 → ?

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Answer: 216

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

Number Chain: 6 → +7 → x5 → -59 → x5 → ?

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Answer: 30

SubType
number-chain
Start
6
Steps
  • {"op":"+","operand":7}
  • {"op":"x","operand":5}
  • {"op":"-","operand":59}
  • {"op":"x","operand":5}
Difficulty
medium

Number Chain: 5 → +9 → +8 → x5 → x4 → ?

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Answer: 440

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