hard Set 51 Form Exercise

Number Chain: 6 → +7 → +11 → -11 → +2 → +10 → ?

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Answer: 25

SubType
number-chain
Start
6
Steps
  • {"op":"+","operand":7}
  • {"op":"+","operand":11}
  • {"op":"-","operand":11}
  • {"op":"+","operand":2}
  • {"op":"+","operand":10}
Difficulty
hard

Number Chain: 3 → +12 → x2 → -17 → -9 → x5 → ?

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Answer: 20

SubType
number-chain
Start
3
Steps
  • {"op":"+","operand":12}
  • {"op":"x","operand":2}
  • {"op":"-","operand":17}
  • {"op":"-","operand":9}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 8 → x4 → -29 → x3 → x3 → -25 → ?

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Answer: 2

SubType
number-chain
Start
8
Steps
  • {"op":"x","operand":4}
  • {"op":"-","operand":29}
  • {"op":"x","operand":3}
  • {"op":"x","operand":3}
  • {"op":"-","operand":25}
Difficulty
hard

Number Chain: 6 → +11 → x2 → -30 → -2 → -1 → ?

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Answer: 1

SubType
number-chain
Start
6
Steps
  • {"op":"+","operand":11}
  • {"op":"x","operand":2}
  • {"op":"-","operand":30}
  • {"op":"-","operand":2}
  • {"op":"-","operand":1}
Difficulty
hard

Number Chain: 3 → -2 → x5 → x3 → +10 → +5 → ?

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Answer: 30

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

Number Chain: 4 → +7 → -6 → -2 → +2 → -4 → ?

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Answer: 1

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

Number Chain: 12 → x5 → x4 → +11 → x4 → -335 → ?

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Answer: 669

SubType
number-chain
Start
12
Steps
  • {"op":"x","operand":5}
  • {"op":"x","operand":4}
  • {"op":"+","operand":11}
  • {"op":"x","operand":4}
  • {"op":"-","operand":335}
Difficulty
hard

Number Chain: 4 → +4 → +8 → +4 → x3 → +12 → ?

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Answer: 72

SubType
number-chain
Start
4
Steps
  • {"op":"+","operand":4}
  • {"op":"+","operand":8}
  • {"op":"+","operand":4}
  • {"op":"x","operand":3}
  • {"op":"+","operand":12}
Difficulty
hard