hard Set 28 Form Exercise

Number Chain: 10 → +7 → x5 → +11 → x3 → x5 → ?

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Answer: 1440

SubType
number-chain
Start
10
Steps
  • {"op":"+","operand":7}
  • {"op":"x","operand":5}
  • {"op":"+","operand":11}
  • {"op":"x","operand":3}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 3 → +1 → x3 → -6 → x3 → x2 → ?

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Answer: 36

SubType
number-chain
Start
3
Steps
  • {"op":"+","operand":1}
  • {"op":"x","operand":3}
  • {"op":"-","operand":6}
  • {"op":"x","operand":3}
  • {"op":"x","operand":2}
Difficulty
hard

Number Chain: 7 → +8 → x4 → +7 → -3 → x5 → ?

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Answer: 320

SubType
number-chain
Start
7
Steps
  • {"op":"+","operand":8}
  • {"op":"x","operand":4}
  • {"op":"+","operand":7}
  • {"op":"-","operand":3}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 10 → x5 → -18 → x2 → +2 → -1 → ?

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Answer: 65

SubType
number-chain
Start
10
Steps
  • {"op":"x","operand":5}
  • {"op":"-","operand":18}
  • {"op":"x","operand":2}
  • {"op":"+","operand":2}
  • {"op":"-","operand":1}
Difficulty
hard

Number Chain: 12 → x2 → x5 → x5 → x3 → x4 → ?

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Answer: 7200

SubType
number-chain
Start
12
Steps
  • {"op":"x","operand":2}
  • {"op":"x","operand":5}
  • {"op":"x","operand":5}
  • {"op":"x","operand":3}
  • {"op":"x","operand":4}
Difficulty
hard

Number Chain: 8 → +10 → +9 → -20 → +1 → +8 → ?

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Answer: 16

SubType
number-chain
Start
8
Steps
  • {"op":"+","operand":10}
  • {"op":"+","operand":9}
  • {"op":"-","operand":20}
  • {"op":"+","operand":1}
  • {"op":"+","operand":8}
Difficulty
hard

Number Chain: 6 → -3 → x4 → x5 → -57 → -2 → ?

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Answer: 1

SubType
number-chain
Start
6
Steps
  • {"op":"-","operand":3}
  • {"op":"x","operand":4}
  • {"op":"x","operand":5}
  • {"op":"-","operand":57}
  • {"op":"-","operand":2}
Difficulty
hard

Number Chain: 3 → x4 → -2 → +5 → x5 → -46 → ?

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Answer: 29

SubType
number-chain
Start
3
Steps
  • {"op":"x","operand":4}
  • {"op":"-","operand":2}
  • {"op":"+","operand":5}
  • {"op":"x","operand":5}
  • {"op":"-","operand":46}
Difficulty
hard