hard Set 43 Form Exercise

Number Chain: 5 → x5 → x2 → -18 → +5 → x2 → ?

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Answer: 74

SubType
number-chain
Start
5
Steps
  • {"op":"x","operand":5}
  • {"op":"x","operand":2}
  • {"op":"-","operand":18}
  • {"op":"+","operand":5}
  • {"op":"x","operand":2}
Difficulty
hard

Number Chain: 6 → -2 → +12 → -6 → +11 → -17 → ?

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Answer: 4

SubType
number-chain
Start
6
Steps
  • {"op":"-","operand":2}
  • {"op":"+","operand":12}
  • {"op":"-","operand":6}
  • {"op":"+","operand":11}
  • {"op":"-","operand":17}
Difficulty
hard

Number Chain: 5 → -3 → x3 → x3 → +4 → x3 → ?

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Answer: 66

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

Number Chain: 6 → x3 → -12 → -3 → x2 → x3 → ?

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Answer: 18

SubType
number-chain
Start
6
Steps
  • {"op":"x","operand":3}
  • {"op":"-","operand":12}
  • {"op":"-","operand":3}
  • {"op":"x","operand":2}
  • {"op":"x","operand":3}
Difficulty
hard

Number Chain: 4 → x5 → x4 → x5 → +9 → +8 → ?

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Answer: 417

SubType
number-chain
Start
4
Steps
  • {"op":"x","operand":5}
  • {"op":"x","operand":4}
  • {"op":"x","operand":5}
  • {"op":"+","operand":9}
  • {"op":"+","operand":8}
Difficulty
hard

Number Chain: 7 → +6 → +2 → -5 → -2 → -2 → ?

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Answer: 6

SubType
number-chain
Start
7
Steps
  • {"op":"+","operand":6}
  • {"op":"+","operand":2}
  • {"op":"-","operand":5}
  • {"op":"-","operand":2}
  • {"op":"-","operand":2}
Difficulty
hard

Number Chain: 3 → +8 → -5 → -5 → +5 → -1 → ?

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Answer: 5

SubType
number-chain
Start
3
Steps
  • {"op":"+","operand":8}
  • {"op":"-","operand":5}
  • {"op":"-","operand":5}
  • {"op":"+","operand":5}
  • {"op":"-","operand":1}
Difficulty
hard

Number Chain: 9 → x4 → +1 → +7 → -18 → x5 → ?

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Answer: 130

SubType
number-chain
Start
9
Steps
  • {"op":"x","operand":4}
  • {"op":"+","operand":1}
  • {"op":"+","operand":7}
  • {"op":"-","operand":18}
  • {"op":"x","operand":5}
Difficulty
hard