hard Set 64 Form Exercise

Number Chain: 10 → -3 → -5 → -1 → +5 → -5 → ?

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Answer: 1

SubType
number-chain
Start
10
Steps
  • {"op":"-","operand":3}
  • {"op":"-","operand":5}
  • {"op":"-","operand":1}
  • {"op":"+","operand":5}
  • {"op":"-","operand":5}
Difficulty
hard

Number Chain: 4 → +1 → -3 → -1 → +7 → -4 → ?

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Answer: 4

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

Number Chain: 3 → +5 → x4 → x3 → +5 → x5 → ?

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Answer: 505

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

Number Chain: 11 → +3 → x3 → -32 → +8 → +2 → ?

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Answer: 20

SubType
number-chain
Start
11
Steps
  • {"op":"+","operand":3}
  • {"op":"x","operand":3}
  • {"op":"-","operand":32}
  • {"op":"+","operand":8}
  • {"op":"+","operand":2}
Difficulty
hard

Number Chain: 12 → +6 → -9 → -7 → x5 → -5 → ?

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Answer: 5

SubType
number-chain
Start
12
Steps
  • {"op":"+","operand":6}
  • {"op":"-","operand":9}
  • {"op":"-","operand":7}
  • {"op":"x","operand":5}
  • {"op":"-","operand":5}
Difficulty
hard

Number Chain: 3 → -2 → +9 → x4 → +5 → +8 → ?

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Answer: 53

SubType
number-chain
Start
3
Steps
  • {"op":"-","operand":2}
  • {"op":"+","operand":9}
  • {"op":"x","operand":4}
  • {"op":"+","operand":5}
  • {"op":"+","operand":8}
Difficulty
hard

Number Chain: 8 → +5 → x3 → +6 → x5 → -10 → ?

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Answer: 215

SubType
number-chain
Start
8
Steps
  • {"op":"+","operand":5}
  • {"op":"x","operand":3}
  • {"op":"+","operand":6}
  • {"op":"x","operand":5}
  • {"op":"-","operand":10}
Difficulty
hard

Number Chain: 1 → -1 → x2 → +10 → +10 → +1 → ?

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Answer: 21

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