hard Set 27 Form Exercise

Number Chain: 9 → +7 → -11 → -1 → +6 → x5 → ?

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Answer: 50

SubType
number-chain
Start
9
Steps
  • {"op":"+","operand":7}
  • {"op":"-","operand":11}
  • {"op":"-","operand":1}
  • {"op":"+","operand":6}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 5 → x3 → -3 → x2 → +3 → +1 → ?

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Answer: 28

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

Number Chain: 5 → +7 → x2 → -14 → x5 → x3 → ?

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Answer: 150

SubType
number-chain
Start
5
Steps
  • {"op":"+","operand":7}
  • {"op":"x","operand":2}
  • {"op":"-","operand":14}
  • {"op":"x","operand":5}
  • {"op":"x","operand":3}
Difficulty
hard

Number Chain: 5 → x2 → x4 → -22 → -10 → +6 → ?

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Answer: 14

SubType
number-chain
Start
5
Steps
  • {"op":"x","operand":2}
  • {"op":"x","operand":4}
  • {"op":"-","operand":22}
  • {"op":"-","operand":10}
  • {"op":"+","operand":6}
Difficulty
hard

Number Chain: 7 → -6 → -1 → -1 → +10 → -7 → ?

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Answer: 2

SubType
number-chain
Start
7
Steps
  • {"op":"-","operand":6}
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
  • {"op":"+","operand":10}
  • {"op":"-","operand":7}
Difficulty
hard

Number Chain: 9 → x3 → x5 → -32 → x5 → x3 → ?

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Answer: 1545

SubType
number-chain
Start
9
Steps
  • {"op":"x","operand":3}
  • {"op":"x","operand":5}
  • {"op":"-","operand":32}
  • {"op":"x","operand":5}
  • {"op":"x","operand":3}
Difficulty
hard

Number Chain: 6 → -2 → -3 → +5 → x3 → -11 → ?

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Answer: 7

SubType
number-chain
Start
6
Steps
  • {"op":"-","operand":2}
  • {"op":"-","operand":3}
  • {"op":"+","operand":5}
  • {"op":"x","operand":3}
  • {"op":"-","operand":11}
Difficulty
hard

Number Chain: 7 → +8 → +5 → +6 → -21 → x5 → ?

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Answer: 25

SubType
number-chain
Start
7
Steps
  • {"op":"+","operand":8}
  • {"op":"+","operand":5}
  • {"op":"+","operand":6}
  • {"op":"-","operand":21}
  • {"op":"x","operand":5}
Difficulty
hard