hard Set 99 Form Exercise

Number Chain: 4 → x3 → -11 → -1 → -1 → +7 → ?

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Answer: 6

SubType
number-chain
Start
4
Steps
  • {"op":"x","operand":3}
  • {"op":"-","operand":11}
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
  • {"op":"+","operand":7}
Difficulty
hard

Number Chain: 12 → x5 → +10 → x4 → +1 → x5 → ?

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Answer: 1405

SubType
number-chain
Start
12
Steps
  • {"op":"x","operand":5}
  • {"op":"+","operand":10}
  • {"op":"x","operand":4}
  • {"op":"+","operand":1}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 8 → x2 → x2 → +4 → x2 → -70 → ?

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Answer: 2

SubType
number-chain
Start
8
Steps
  • {"op":"x","operand":2}
  • {"op":"x","operand":2}
  • {"op":"+","operand":4}
  • {"op":"x","operand":2}
  • {"op":"-","operand":70}
Difficulty
hard

Number Chain: 2 → +6 → +6 → +8 → +6 → +4 → ?

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Answer: 32

SubType
number-chain
Start
2
Steps
  • {"op":"+","operand":6}
  • {"op":"+","operand":6}
  • {"op":"+","operand":8}
  • {"op":"+","operand":6}
  • {"op":"+","operand":4}
Difficulty
hard

Number Chain: 11 → +11 → +5 → x3 → +12 → +1 → ?

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Answer: 94

SubType
number-chain
Start
11
Steps
  • {"op":"+","operand":11}
  • {"op":"+","operand":5}
  • {"op":"x","operand":3}
  • {"op":"+","operand":12}
  • {"op":"+","operand":1}
Difficulty
hard

Number Chain: 7 → -4 → x5 → +1 → x5 → -37 → ?

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Answer: 43

SubType
number-chain
Start
7
Steps
  • {"op":"-","operand":4}
  • {"op":"x","operand":5}
  • {"op":"+","operand":1}
  • {"op":"x","operand":5}
  • {"op":"-","operand":37}
Difficulty
hard

Number Chain: 8 → -7 → +2 → +2 → +6 → +6 → ?

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Answer: 17

SubType
number-chain
Start
8
Steps
  • {"op":"-","operand":7}
  • {"op":"+","operand":2}
  • {"op":"+","operand":2}
  • {"op":"+","operand":6}
  • {"op":"+","operand":6}
Difficulty
hard

Number Chain: 7 → +2 → -3 → +7 → x5 → -62 → ?

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Answer: 3

SubType
number-chain
Start
7
Steps
  • {"op":"+","operand":2}
  • {"op":"-","operand":3}
  • {"op":"+","operand":7}
  • {"op":"x","operand":5}
  • {"op":"-","operand":62}
Difficulty
hard