hard Set 85 Form Exercise

Number Chain: 7 → +3 → -4 → x5 → +6 → +4 → ?

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Answer: 40

SubType
number-chain
Start
7
Steps
  • {"op":"+","operand":3}
  • {"op":"-","operand":4}
  • {"op":"x","operand":5}
  • {"op":"+","operand":6}
  • {"op":"+","operand":4}
Difficulty
hard

Number Chain: 7 → x5 → +4 → +12 → -44 → +6 → ?

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Answer: 13

SubType
number-chain
Start
7
Steps
  • {"op":"x","operand":5}
  • {"op":"+","operand":4}
  • {"op":"+","operand":12}
  • {"op":"-","operand":44}
  • {"op":"+","operand":6}
Difficulty
hard

Number Chain: 10 → -2 → +5 → x4 → +4 → +1 → ?

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Answer: 57

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

Number Chain: 1 → -1 → +11 → x3 → +5 → +4 → ?

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Answer: 42

SubType
number-chain
Start
1
Steps
  • {"op":"-","operand":1}
  • {"op":"+","operand":11}
  • {"op":"x","operand":3}
  • {"op":"+","operand":5}
  • {"op":"+","operand":4}
Difficulty
hard

Number Chain: 10 → x3 → x3 → x4 → x4 → +11 → ?

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Answer: 1451

SubType
number-chain
Start
10
Steps
  • {"op":"x","operand":3}
  • {"op":"x","operand":3}
  • {"op":"x","operand":4}
  • {"op":"x","operand":4}
  • {"op":"+","operand":11}
Difficulty
hard

Number Chain: 2 → +11 → -6 → -6 → -1 → +7 → ?

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Answer: 7

SubType
number-chain
Start
2
Steps
  • {"op":"+","operand":11}
  • {"op":"-","operand":6}
  • {"op":"-","operand":6}
  • {"op":"-","operand":1}
  • {"op":"+","operand":7}
Difficulty
hard

Number Chain: 3 → x3 → +1 → -4 → -2 → +3 → ?

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Answer: 7

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

Number Chain: 9 → +7 → x3 → +2 → x2 → +8 → ?

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Answer: 108

SubType
number-chain
Start
9
Steps
  • {"op":"+","operand":7}
  • {"op":"x","operand":3}
  • {"op":"+","operand":2}
  • {"op":"x","operand":2}
  • {"op":"+","operand":8}
Difficulty
hard