hard Set 39 Form Exercise

Number Chain: 10 → x2 → x5 → -23 → x5 → -247 → ?

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Answer: 138

SubType
number-chain
Start
10
Steps
  • {"op":"x","operand":2}
  • {"op":"x","operand":5}
  • {"op":"-","operand":23}
  • {"op":"x","operand":5}
  • {"op":"-","operand":247}
Difficulty
hard

Number Chain: 11 → +6 → x5 → +4 → +4 → +3 → ?

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Answer: 96

SubType
number-chain
Start
11
Steps
  • {"op":"+","operand":6}
  • {"op":"x","operand":5}
  • {"op":"+","operand":4}
  • {"op":"+","operand":4}
  • {"op":"+","operand":3}
Difficulty
hard

Number Chain: 11 → x2 → +3 → -18 → -2 → x5 → ?

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Answer: 25

SubType
number-chain
Start
11
Steps
  • {"op":"x","operand":2}
  • {"op":"+","operand":3}
  • {"op":"-","operand":18}
  • {"op":"-","operand":2}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 6 → x3 → x5 → x2 → x5 → +3 → ?

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Answer: 903

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

Number Chain: 8 → +5 → +3 → x2 → x3 → -64 → ?

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Answer: 32

SubType
number-chain
Start
8
Steps
  • {"op":"+","operand":5}
  • {"op":"+","operand":3}
  • {"op":"x","operand":2}
  • {"op":"x","operand":3}
  • {"op":"-","operand":64}
Difficulty
hard

Number Chain: 2 → x5 → -2 → +5 → -11 → -1 → ?

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Answer: 1

SubType
number-chain
Start
2
Steps
  • {"op":"x","operand":5}
  • {"op":"-","operand":2}
  • {"op":"+","operand":5}
  • {"op":"-","operand":11}
  • {"op":"-","operand":1}
Difficulty
hard

Number Chain: 11 → -1 → x4 → -13 → x3 → -2 → ?

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Answer: 79

SubType
number-chain
Start
11
Steps
  • {"op":"-","operand":1}
  • {"op":"x","operand":4}
  • {"op":"-","operand":13}
  • {"op":"x","operand":3}
  • {"op":"-","operand":2}
Difficulty
hard

Number Chain: 10 → +2 → x3 → +4 → -26 → x3 → ?

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Answer: 42

SubType
number-chain
Start
10
Steps
  • {"op":"+","operand":2}
  • {"op":"x","operand":3}
  • {"op":"+","operand":4}
  • {"op":"-","operand":26}
  • {"op":"x","operand":3}
Difficulty
hard