hard Set 18 Form Exercise

Number Chain: 8 → -3 → +1 → +11 → -10 → +7 → ?

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Answer: 14

SubType
number-chain
Start
8
Steps
  • {"op":"-","operand":3}
  • {"op":"+","operand":1}
  • {"op":"+","operand":11}
  • {"op":"-","operand":10}
  • {"op":"+","operand":7}
Difficulty
hard

Number Chain: 3 → +3 → x3 → +8 → -6 → -3 → ?

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Answer: 17

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

Number Chain: 2 → -1 → +6 → -2 → x3 → x4 → ?

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Answer: 60

SubType
number-chain
Start
2
Steps
  • {"op":"-","operand":1}
  • {"op":"+","operand":6}
  • {"op":"-","operand":2}
  • {"op":"x","operand":3}
  • {"op":"x","operand":4}
Difficulty
hard

Number Chain: 4 → -3 → -1 → +9 → +9 → x2 → ?

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Answer: 36

SubType
number-chain
Start
4
Steps
  • {"op":"-","operand":3}
  • {"op":"-","operand":1}
  • {"op":"+","operand":9}
  • {"op":"+","operand":9}
  • {"op":"x","operand":2}
Difficulty
hard

Number Chain: 5 → -1 → x4 → x5 → x2 → +6 → ?

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Answer: 166

SubType
number-chain
Start
5
Steps
  • {"op":"-","operand":1}
  • {"op":"x","operand":4}
  • {"op":"x","operand":5}
  • {"op":"x","operand":2}
  • {"op":"+","operand":6}
Difficulty
hard

Number Chain: 6 → +2 → +7 → -1 → -13 → -1 → ?

SubType
number-chain
Start
6
Steps
  • {"op":"+","operand":2}
  • {"op":"+","operand":7}
  • {"op":"-","operand":1}
  • {"op":"-","operand":13}
  • {"op":"-","operand":1}
Difficulty
hard

Number Chain: 9 → +8 → x5 → +3 → -16 → +12 → ?

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Answer: 84

SubType
number-chain
Start
9
Steps
  • {"op":"+","operand":8}
  • {"op":"x","operand":5}
  • {"op":"+","operand":3}
  • {"op":"-","operand":16}
  • {"op":"+","operand":12}
Difficulty
hard

Number Chain: 2 → -1 → x4 → +4 → -4 → +4 → ?

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Answer: 8

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