medium Set 74 Form Exercise

Number Chain: 4 → -1 → -2 → -1 → +10 → ?

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Answer: 10

SubType
number-chain
Start
4
Steps
  • {"op":"-","operand":1}
  • {"op":"-","operand":2}
  • {"op":"-","operand":1}
  • {"op":"+","operand":10}
Difficulty
medium

Number Chain: 4 → x2 → x4 → -20 → x4 → ?

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Answer: 48

SubType
number-chain
Start
4
Steps
  • {"op":"x","operand":2}
  • {"op":"x","operand":4}
  • {"op":"-","operand":20}
  • {"op":"x","operand":4}
Difficulty
medium

Number Chain: 10 → -8 → -1 → -1 → +1 → ?

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Answer: 1

SubType
number-chain
Start
10
Steps
  • {"op":"-","operand":8}
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
  • {"op":"+","operand":1}
Difficulty
medium

Number Chain: 10 → -6 → x5 → +2 → x3 → ?

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Answer: 66

SubType
number-chain
Start
10
Steps
  • {"op":"-","operand":6}
  • {"op":"x","operand":5}
  • {"op":"+","operand":2}
  • {"op":"x","operand":3}
Difficulty
medium

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

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Answer: 3

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

Number Chain: 6 → +4 → +3 → x4 → -5 → ?

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Answer: 47

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

Number Chain: 6 → x5 → +10 → x3 → -30 → ?

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Answer: 90

SubType
number-chain
Start
6
Steps
  • {"op":"x","operand":5}
  • {"op":"+","operand":10}
  • {"op":"x","operand":3}
  • {"op":"-","operand":30}
Difficulty
medium

Number Chain: 3 → -1 → x5 → -2 → -1 → ?

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Answer: 7

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