hard Set 32 Form Exercise

Number Chain: 4 → x2 → +2 → -2 → -2 → x2 → ?

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Answer: 12

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

Number Chain: 11 → +8 → +7 → +10 → -35 → -1 → ?

SubType
number-chain
Start
11
Steps
  • {"op":"+","operand":8}
  • {"op":"+","operand":7}
  • {"op":"+","operand":10}
  • {"op":"-","operand":35}
  • {"op":"-","operand":1}
Difficulty
hard

Number Chain: 12 → +11 → x4 → +12 → x3 → x4 → ?

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Answer: 1248

SubType
number-chain
Start
12
Steps
  • {"op":"+","operand":11}
  • {"op":"x","operand":4}
  • {"op":"+","operand":12}
  • {"op":"x","operand":3}
  • {"op":"x","operand":4}
Difficulty
hard

Number Chain: 11 → -2 → -8 → +8 → -1 → -2 → ?

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Answer: 6

SubType
number-chain
Start
11
Steps
  • {"op":"-","operand":2}
  • {"op":"-","operand":8}
  • {"op":"+","operand":8}
  • {"op":"-","operand":1}
  • {"op":"-","operand":2}
Difficulty
hard

Number Chain: 12 → x2 → x4 → x3 → -143 → +9 → ?

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Answer: 154

SubType
number-chain
Start
12
Steps
  • {"op":"x","operand":2}
  • {"op":"x","operand":4}
  • {"op":"x","operand":3}
  • {"op":"-","operand":143}
  • {"op":"+","operand":9}
Difficulty
hard

Number Chain: 10 → -9 → -1 → x2 → +6 → x4 → ?

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Answer: 24

SubType
number-chain
Start
10
Steps
  • {"op":"-","operand":9}
  • {"op":"-","operand":1}
  • {"op":"x","operand":2}
  • {"op":"+","operand":6}
  • {"op":"x","operand":4}
Difficulty
hard

Number Chain: 2 → +8 → -1 → -8 → x3 → x3 → ?

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Answer: 9

SubType
number-chain
Start
2
Steps
  • {"op":"+","operand":8}
  • {"op":"-","operand":1}
  • {"op":"-","operand":8}
  • {"op":"x","operand":3}
  • {"op":"x","operand":3}
Difficulty
hard

Number Chain: 2 → x4 → -7 → +6 → x4 → -21 → ?

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Answer: 7

SubType
number-chain
Start
2
Steps
  • {"op":"x","operand":4}
  • {"op":"-","operand":7}
  • {"op":"+","operand":6}
  • {"op":"x","operand":4}
  • {"op":"-","operand":21}
Difficulty
hard