hard Set 70 Form Exercise

Number Chain: 1 → x5 → +2 → x5 → x2 → x5 → ?

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Answer: 350

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

Number Chain: 10 → +2 → +3 → -10 → +4 → x2 → ?

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Answer: 18

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

Number Chain: 7 → x3 → -5 → -2 → +10 → x3 → ?

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Answer: 72

SubType
number-chain
Start
7
Steps
  • {"op":"x","operand":3}
  • {"op":"-","operand":5}
  • {"op":"-","operand":2}
  • {"op":"+","operand":10}
  • {"op":"x","operand":3}
Difficulty
hard

Number Chain: 12 → -1 → +5 → x5 → +6 → x3 → ?

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Answer: 258

SubType
number-chain
Start
12
Steps
  • {"op":"-","operand":1}
  • {"op":"+","operand":5}
  • {"op":"x","operand":5}
  • {"op":"+","operand":6}
  • {"op":"x","operand":3}
Difficulty
hard

Number Chain: 5 → -2 → -1 → x5 → +10 → x4 → ?

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Answer: 80

SubType
number-chain
Start
5
Steps
  • {"op":"-","operand":2}
  • {"op":"-","operand":1}
  • {"op":"x","operand":5}
  • {"op":"+","operand":10}
  • {"op":"x","operand":4}
Difficulty
hard

Number Chain: 5 → x4 → -18 → x5 → +1 → +6 → ?

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Answer: 17

SubType
number-chain
Start
5
Steps
  • {"op":"x","operand":4}
  • {"op":"-","operand":18}
  • {"op":"x","operand":5}
  • {"op":"+","operand":1}
  • {"op":"+","operand":6}
Difficulty
hard

Number Chain: 7 → +10 → x2 → +6 → x5 → +3 → ?

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Answer: 203

SubType
number-chain
Start
7
Steps
  • {"op":"+","operand":10}
  • {"op":"x","operand":2}
  • {"op":"+","operand":6}
  • {"op":"x","operand":5}
  • {"op":"+","operand":3}
Difficulty
hard

Number Chain: 11 → x5 → -39 → -8 → +6 → -6 → ?

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Answer: 8

SubType
number-chain
Start
11
Steps
  • {"op":"x","operand":5}
  • {"op":"-","operand":39}
  • {"op":"-","operand":8}
  • {"op":"+","operand":6}
  • {"op":"-","operand":6}
Difficulty
hard