medium Set 16 Form Exercise

Number Chain: 8 → x2 → -8 → -3 → +5 → ?

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Answer: 10

SubType
number-chain
Start
8
Steps
  • {"op":"x","operand":2}
  • {"op":"-","operand":8}
  • {"op":"-","operand":3}
  • {"op":"+","operand":5}
Difficulty
medium

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

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Answer: 1

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

Number Chain: 3 → +10 → -7 → -3 → +8 → ?

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Answer: 11

SubType
number-chain
Start
3
Steps
  • {"op":"+","operand":10}
  • {"op":"-","operand":7}
  • {"op":"-","operand":3}
  • {"op":"+","operand":8}
Difficulty
medium

Number Chain: 9 → +9 → -3 → x4 → -55 → ?

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Answer: 5

SubType
number-chain
Start
9
Steps
  • {"op":"+","operand":9}
  • {"op":"-","operand":3}
  • {"op":"x","operand":4}
  • {"op":"-","operand":55}
Difficulty
medium

Number Chain: 10 → -3 → +9 → +3 → x4 → ?

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Answer: 76

SubType
number-chain
Start
10
Steps
  • {"op":"-","operand":3}
  • {"op":"+","operand":9}
  • {"op":"+","operand":3}
  • {"op":"x","operand":4}
Difficulty
medium

Number Chain: 1 → +1 → +5 → +2 → +10 → ?

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Answer: 19

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

Number Chain: 10 → -6 → x3 → +9 → x2 → ?

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Answer: 42

SubType
number-chain
Start
10
Steps
  • {"op":"-","operand":6}
  • {"op":"x","operand":3}
  • {"op":"+","operand":9}
  • {"op":"x","operand":2}
Difficulty
medium

Number Chain: 1 → -1 → +8 → x2 → -2 → ?

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Answer: 14

SubType
number-chain
Start
1
Steps
  • {"op":"-","operand":1}
  • {"op":"+","operand":8}
  • {"op":"x","operand":2}
  • {"op":"-","operand":2}
Difficulty
medium