hard Set 74 Form Exercise

Number Chain: 10 → +4 → x3 → -40 → x4 → -5 → ?

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Answer: 3

SubType
number-chain
Start
10
Steps
  • {"op":"+","operand":4}
  • {"op":"x","operand":3}
  • {"op":"-","operand":40}
  • {"op":"x","operand":4}
  • {"op":"-","operand":5}
Difficulty
hard

Number Chain: 9 → -2 → +9 → +3 → x2 → +12 → ?

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Answer: 50

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

Number Chain: 1 → +12 → -2 → +10 → -8 → -5 → ?

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Answer: 8

SubType
number-chain
Start
1
Steps
  • {"op":"+","operand":12}
  • {"op":"-","operand":2}
  • {"op":"+","operand":10}
  • {"op":"-","operand":8}
  • {"op":"-","operand":5}
Difficulty
hard

Number Chain: 10 → -9 → x3 → +12 → -4 → -2 → ?

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Answer: 9

SubType
number-chain
Start
10
Steps
  • {"op":"-","operand":9}
  • {"op":"x","operand":3}
  • {"op":"+","operand":12}
  • {"op":"-","operand":4}
  • {"op":"-","operand":2}
Difficulty
hard

Number Chain: 5 → -3 → +1 → x2 → x4 → -21 → ?

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Answer: 3

SubType
number-chain
Start
5
Steps
  • {"op":"-","operand":3}
  • {"op":"+","operand":1}
  • {"op":"x","operand":2}
  • {"op":"x","operand":4}
  • {"op":"-","operand":21}
Difficulty
hard

Number Chain: 8 → +9 → x5 → -75 → +3 → -10 → ?

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Answer: 3

SubType
number-chain
Start
8
Steps
  • {"op":"+","operand":9}
  • {"op":"x","operand":5}
  • {"op":"-","operand":75}
  • {"op":"+","operand":3}
  • {"op":"-","operand":10}
Difficulty
hard

Number Chain: 4 → x4 → -6 → x3 → -8 → x4 → ?

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Answer: 88

SubType
number-chain
Start
4
Steps
  • {"op":"x","operand":4}
  • {"op":"-","operand":6}
  • {"op":"x","operand":3}
  • {"op":"-","operand":8}
  • {"op":"x","operand":4}
Difficulty
hard

Number Chain: 4 → +1 → +11 → -3 → -3 → -3 → ?

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Answer: 7

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