hard Set 30 Form Exercise

Number Chain: 8 → -3 → x4 → -10 → x2 → -19 → ?

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Answer: 1

SubType
number-chain
Start
8
Steps
  • {"op":"-","operand":3}
  • {"op":"x","operand":4}
  • {"op":"-","operand":10}
  • {"op":"x","operand":2}
  • {"op":"-","operand":19}
Difficulty
hard

Number Chain: 8 → x4 → x2 → -35 → x4 → x3 → ?

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Answer: 348

SubType
number-chain
Start
8
Steps
  • {"op":"x","operand":4}
  • {"op":"x","operand":2}
  • {"op":"-","operand":35}
  • {"op":"x","operand":4}
  • {"op":"x","operand":3}
Difficulty
hard

Number Chain: 6 → x2 → +1 → x2 → +11 → -22 → ?

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Answer: 15

SubType
number-chain
Start
6
Steps
  • {"op":"x","operand":2}
  • {"op":"+","operand":1}
  • {"op":"x","operand":2}
  • {"op":"+","operand":11}
  • {"op":"-","operand":22}
Difficulty
hard

Number Chain: 9 → x5 → x4 → x2 → x4 → +3 → ?

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Answer: 1443

SubType
number-chain
Start
9
Steps
  • {"op":"x","operand":5}
  • {"op":"x","operand":4}
  • {"op":"x","operand":2}
  • {"op":"x","operand":4}
  • {"op":"+","operand":3}
Difficulty
hard

Number Chain: 2 → x4 → +5 → x4 → x2 → x5 → ?

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Answer: 520

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

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

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Answer: 102

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

Number Chain: 8 → +8 → -3 → +4 → +6 → x4 → ?

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Answer: 92

SubType
number-chain
Start
8
Steps
  • {"op":"+","operand":8}
  • {"op":"-","operand":3}
  • {"op":"+","operand":4}
  • {"op":"+","operand":6}
  • {"op":"x","operand":4}
Difficulty
hard

Number Chain: 10 → -6 → x3 → +12 → +11 → -8 → ?

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Answer: 27

SubType
number-chain
Start
10
Steps
  • {"op":"-","operand":6}
  • {"op":"x","operand":3}
  • {"op":"+","operand":12}
  • {"op":"+","operand":11}
  • {"op":"-","operand":8}
Difficulty
hard