hard Set 49 Form Exercise

Number Chain: 9 → +10 → x2 → x5 → x5 → x4 → ?

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Answer: 3800

SubType
number-chain
Start
9
Steps
  • {"op":"+","operand":10}
  • {"op":"x","operand":2}
  • {"op":"x","operand":5}
  • {"op":"x","operand":5}
  • {"op":"x","operand":4}
Difficulty
hard

Number Chain: 5 → +11 → x5 → -25 → x5 → +10 → ?

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Answer: 285

SubType
number-chain
Start
5
Steps
  • {"op":"+","operand":11}
  • {"op":"x","operand":5}
  • {"op":"-","operand":25}
  • {"op":"x","operand":5}
  • {"op":"+","operand":10}
Difficulty
hard

Number Chain: 5 → +9 → -4 → -9 → x5 → +9 → ?

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Answer: 14

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

Number Chain: 10 → x3 → +11 → x5 → x4 → +5 → ?

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Answer: 825

SubType
number-chain
Start
10
Steps
  • {"op":"x","operand":3}
  • {"op":"+","operand":11}
  • {"op":"x","operand":5}
  • {"op":"x","operand":4}
  • {"op":"+","operand":5}
Difficulty
hard

Number Chain: 10 → +7 → -12 → -2 → -2 → +10 → ?

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Answer: 11

SubType
number-chain
Start
10
Steps
  • {"op":"+","operand":7}
  • {"op":"-","operand":12}
  • {"op":"-","operand":2}
  • {"op":"-","operand":2}
  • {"op":"+","operand":10}
Difficulty
hard

Number Chain: 5 → -3 → +10 → -10 → +8 → +5 → ?

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Answer: 15

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

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

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Answer: 3

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

Number Chain: 5 → x3 → -4 → -5 → +8 → +4 → ?

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Answer: 18

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