medium Set 12 Form Exercise

Number Chain: 5 → +3 → -6 → +9 → -7 → ?

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Answer: 4

SubType
number-chain
Start
5
Steps
  • {"op":"+","operand":3}
  • {"op":"-","operand":6}
  • {"op":"+","operand":9}
  • {"op":"-","operand":7}
Difficulty
medium

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

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Answer: 2

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

Number Chain: 2 → -1 → -1 → +6 → +9 → ?

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Answer: 15

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

Number Chain: 1 → +2 → x5 → +10 → x3 → ?

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Answer: 75

SubType
number-chain
Start
1
Steps
  • {"op":"+","operand":2}
  • {"op":"x","operand":5}
  • {"op":"+","operand":10}
  • {"op":"x","operand":3}
Difficulty
medium

Number Chain: 1 → x5 → +9 → x2 → -5 → ?

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Answer: 23

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

Number Chain: 1 → +10 → +6 → -1 → -11 → ?

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Answer: 5

SubType
number-chain
Start
1
Steps
  • {"op":"+","operand":10}
  • {"op":"+","operand":6}
  • {"op":"-","operand":1}
  • {"op":"-","operand":11}
Difficulty
medium

Number Chain: 7 → x3 → -19 → +8 → -9 → ?

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Answer: 1

SubType
number-chain
Start
7
Steps
  • {"op":"x","operand":3}
  • {"op":"-","operand":19}
  • {"op":"+","operand":8}
  • {"op":"-","operand":9}
Difficulty
medium

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

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Answer: 18

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