hard Set 97 Form Exercise

Number Chain: 10 → +2 → x5 → -3 → x4 → -160 → ?

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Answer: 68

SubType
number-chain
Start
10
Steps
  • {"op":"+","operand":2}
  • {"op":"x","operand":5}
  • {"op":"-","operand":3}
  • {"op":"x","operand":4}
  • {"op":"-","operand":160}
Difficulty
hard

Number Chain: 10 → x4 → +11 → +12 → -12 → -28 → ?

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Answer: 23

SubType
number-chain
Start
10
Steps
  • {"op":"x","operand":4}
  • {"op":"+","operand":11}
  • {"op":"+","operand":12}
  • {"op":"-","operand":12}
  • {"op":"-","operand":28}
Difficulty
hard

Number Chain: 9 → -2 → -3 → +4 → +12 → -6 → ?

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Answer: 14

SubType
number-chain
Start
9
Steps
  • {"op":"-","operand":2}
  • {"op":"-","operand":3}
  • {"op":"+","operand":4}
  • {"op":"+","operand":12}
  • {"op":"-","operand":6}
Difficulty
hard

Number Chain: 6 → +5 → -2 → x2 → +2 → -13 → ?

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Answer: 7

SubType
number-chain
Start
6
Steps
  • {"op":"+","operand":5}
  • {"op":"-","operand":2}
  • {"op":"x","operand":2}
  • {"op":"+","operand":2}
  • {"op":"-","operand":13}
Difficulty
hard

Number Chain: 6 → -1 → x4 → -6 → -10 → -2 → ?

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Answer: 2

SubType
number-chain
Start
6
Steps
  • {"op":"-","operand":1}
  • {"op":"x","operand":4}
  • {"op":"-","operand":6}
  • {"op":"-","operand":10}
  • {"op":"-","operand":2}
Difficulty
hard

Number Chain: 7 → -6 → +5 → -1 → x3 → x4 → ?

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Answer: 60

SubType
number-chain
Start
7
Steps
  • {"op":"-","operand":6}
  • {"op":"+","operand":5}
  • {"op":"-","operand":1}
  • {"op":"x","operand":3}
  • {"op":"x","operand":4}
Difficulty
hard

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

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Answer: 100

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

Number Chain: 4 → +10 → +12 → x2 → -41 → -5 → ?

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Answer: 6

SubType
number-chain
Start
4
Steps
  • {"op":"+","operand":10}
  • {"op":"+","operand":12}
  • {"op":"x","operand":2}
  • {"op":"-","operand":41}
  • {"op":"-","operand":5}
Difficulty
hard