medium Set 91 Form Exercise

Number Chain: 5 → +3 → x2 → -14 → x4 → ?

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Answer: 8

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

Number Chain: 5 → +6 → -2 → x3 → x2 → ?

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Answer: 54

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

Number Chain: 10 → -7 → +1 → -1 → +1 → ?

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Answer: 4

SubType
number-chain
Start
10
Steps
  • {"op":"-","operand":7}
  • {"op":"+","operand":1}
  • {"op":"-","operand":1}
  • {"op":"+","operand":1}
Difficulty
medium

Number Chain: 6 → x4 → -14 → -3 → +8 → ?

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Answer: 15

SubType
number-chain
Start
6
Steps
  • {"op":"x","operand":4}
  • {"op":"-","operand":14}
  • {"op":"-","operand":3}
  • {"op":"+","operand":8}
Difficulty
medium

Number Chain: 7 → +7 → x4 → +2 → x5 → ?

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Answer: 290

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

Number Chain: 8 → x3 → -9 → x2 → x3 → ?

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Answer: 90

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

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

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Answer: 70

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

Number Chain: 6 → +9 → x4 → -34 → +1 → ?

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Answer: 27

SubType
number-chain
Start
6
Steps
  • {"op":"+","operand":9}
  • {"op":"x","operand":4}
  • {"op":"-","operand":34}
  • {"op":"+","operand":1}
Difficulty
medium