hard Set 26 Form Exercise

Number Chain: 1 → +4 → +3 → +5 → x2 → +12 → ?

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Answer: 38

SubType
number-chain
Start
1
Steps
  • {"op":"+","operand":4}
  • {"op":"+","operand":3}
  • {"op":"+","operand":5}
  • {"op":"x","operand":2}
  • {"op":"+","operand":12}
Difficulty
hard

Number Chain: 11 → -9 → -1 → -1 → -1 → -1 → ?

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Answer: -2

SubType
number-chain
Start
11
Steps
  • {"op":"-","operand":9}
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
Difficulty
hard

Number Chain: 4 → -2 → +9 → +8 → -15 → x5 → ?

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Answer: 20

SubType
number-chain
Start
4
Steps
  • {"op":"-","operand":2}
  • {"op":"+","operand":9}
  • {"op":"+","operand":8}
  • {"op":"-","operand":15}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 2 → x4 → +10 → +9 → -20 → x3 → ?

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Answer: 21

SubType
number-chain
Start
2
Steps
  • {"op":"x","operand":4}
  • {"op":"+","operand":10}
  • {"op":"+","operand":9}
  • {"op":"-","operand":20}
  • {"op":"x","operand":3}
Difficulty
hard

Number Chain: 11 → x5 → -19 → +7 → +12 → +2 → ?

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Answer: 57

SubType
number-chain
Start
11
Steps
  • {"op":"x","operand":5}
  • {"op":"-","operand":19}
  • {"op":"+","operand":7}
  • {"op":"+","operand":12}
  • {"op":"+","operand":2}
Difficulty
hard

Number Chain: 12 → x3 → -8 → +2 → -14 → x2 → ?

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Answer: 32

SubType
number-chain
Start
12
Steps
  • {"op":"x","operand":3}
  • {"op":"-","operand":8}
  • {"op":"+","operand":2}
  • {"op":"-","operand":14}
  • {"op":"x","operand":2}
Difficulty
hard

Number Chain: 1 → -1 → -1 → -1 → -1 → -1 → ?

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Answer: -4

SubType
number-chain
Start
1
Steps
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
Difficulty
hard

Number Chain: 8 → x5 → x4 → +2 → x2 → -9 → ?

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Answer: 315

SubType
number-chain
Start
8
Steps
  • {"op":"x","operand":5}
  • {"op":"x","operand":4}
  • {"op":"+","operand":2}
  • {"op":"x","operand":2}
  • {"op":"-","operand":9}
Difficulty
hard