hard Set 40 Form Exercise

Number Chain: 7 → x3 → +6 → -25 → x4 → -3 → ?

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Answer: 5

SubType
number-chain
Start
7
Steps
  • {"op":"x","operand":3}
  • {"op":"+","operand":6}
  • {"op":"-","operand":25}
  • {"op":"x","operand":4}
  • {"op":"-","operand":3}
Difficulty
hard

Number Chain: 2 → +10 → x5 → +6 → -17 → x4 → ?

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Answer: 196

SubType
number-chain
Start
2
Steps
  • {"op":"+","operand":10}
  • {"op":"x","operand":5}
  • {"op":"+","operand":6}
  • {"op":"-","operand":17}
  • {"op":"x","operand":4}
Difficulty
hard

Number Chain: 6 → x4 → -20 → +8 → x5 → -16 → ?

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Answer: 44

SubType
number-chain
Start
6
Steps
  • {"op":"x","operand":4}
  • {"op":"-","operand":20}
  • {"op":"+","operand":8}
  • {"op":"x","operand":5}
  • {"op":"-","operand":16}
Difficulty
hard

Number Chain: 6 → x3 → x3 → x3 → x4 → -594 → ?

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Answer: 54

SubType
number-chain
Start
6
Steps
  • {"op":"x","operand":3}
  • {"op":"x","operand":3}
  • {"op":"x","operand":3}
  • {"op":"x","operand":4}
  • {"op":"-","operand":594}
Difficulty
hard

Number Chain: 12 → +12 → -13 → x5 → x5 → -166 → ?

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Answer: 109

SubType
number-chain
Start
12
Steps
  • {"op":"+","operand":12}
  • {"op":"-","operand":13}
  • {"op":"x","operand":5}
  • {"op":"x","operand":5}
  • {"op":"-","operand":166}
Difficulty
hard

Number Chain: 8 → -2 → x2 → x3 → -12 → -11 → ?

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Answer: 13

SubType
number-chain
Start
8
Steps
  • {"op":"-","operand":2}
  • {"op":"x","operand":2}
  • {"op":"x","operand":3}
  • {"op":"-","operand":12}
  • {"op":"-","operand":11}
Difficulty
hard

Number Chain: 7 → x5 → +11 → -28 → -14 → -2 → ?

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Answer: 2

SubType
number-chain
Start
7
Steps
  • {"op":"x","operand":5}
  • {"op":"+","operand":11}
  • {"op":"-","operand":28}
  • {"op":"-","operand":14}
  • {"op":"-","operand":2}
Difficulty
hard

Number Chain: 2 → +12 → -1 → -3 → +5 → -3 → ?

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Answer: 12

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