hard Set 100 Form Exercise

Number Chain: 1 → +7 → x2 → -14 → +8 → +10 → ?

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Answer: 20

SubType
number-chain
Start
1
Steps
  • {"op":"+","operand":7}
  • {"op":"x","operand":2}
  • {"op":"-","operand":14}
  • {"op":"+","operand":8}
  • {"op":"+","operand":10}
Difficulty
hard

Number Chain: 5 → x2 → +7 → -5 → x4 → -28 → ?

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Answer: 20

SubType
number-chain
Start
5
Steps
  • {"op":"x","operand":2}
  • {"op":"+","operand":7}
  • {"op":"-","operand":5}
  • {"op":"x","operand":4}
  • {"op":"-","operand":28}
Difficulty
hard

Number Chain: 6 → +4 → +11 → x4 → x5 → +5 → ?

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Answer: 425

SubType
number-chain
Start
6
Steps
  • {"op":"+","operand":4}
  • {"op":"+","operand":11}
  • {"op":"x","operand":4}
  • {"op":"x","operand":5}
  • {"op":"+","operand":5}
Difficulty
hard

Number Chain: 1 → x5 → -4 → x4 → -1 → +12 → ?

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Answer: 15

SubType
number-chain
Start
1
Steps
  • {"op":"x","operand":5}
  • {"op":"-","operand":4}
  • {"op":"x","operand":4}
  • {"op":"-","operand":1}
  • {"op":"+","operand":12}
Difficulty
hard

Number Chain: 8 → x2 → +4 → +4 → +12 → +8 → ?

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Answer: 44

SubType
number-chain
Start
8
Steps
  • {"op":"x","operand":2}
  • {"op":"+","operand":4}
  • {"op":"+","operand":4}
  • {"op":"+","operand":12}
  • {"op":"+","operand":8}
Difficulty
hard

Number Chain: 12 → x2 → -19 → -1 → +3 → x5 → ?

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Answer: 35

SubType
number-chain
Start
12
Steps
  • {"op":"x","operand":2}
  • {"op":"-","operand":19}
  • {"op":"-","operand":1}
  • {"op":"+","operand":3}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 4 → x5 → +3 → x2 → -4 → +7 → ?

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Answer: 49

SubType
number-chain
Start
4
Steps
  • {"op":"x","operand":5}
  • {"op":"+","operand":3}
  • {"op":"x","operand":2}
  • {"op":"-","operand":4}
  • {"op":"+","operand":7}
Difficulty
hard

Number Chain: 2 → +2 → x3 → -1 → +10 → x2 → ?

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Answer: 42

SubType
number-chain
Start
2
Steps
  • {"op":"+","operand":2}
  • {"op":"x","operand":3}
  • {"op":"-","operand":1}
  • {"op":"+","operand":10}
  • {"op":"x","operand":2}
Difficulty
hard