hard Set 100 Form Exercise

Number Chain: 1 → +9 → -8 → x2 → -2 → +6 → ?

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Answer: 8

SubType
number-chain
Start
1
Steps
  • {"op":"+","operand":9}
  • {"op":"-","operand":8}
  • {"op":"x","operand":2}
  • {"op":"-","operand":2}
  • {"op":"+","operand":6}
Difficulty
hard

Number Chain: 10 → x5 → -32 → +3 → x2 → -11 → ?

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Answer: 31

SubType
number-chain
Start
10
Steps
  • {"op":"x","operand":5}
  • {"op":"-","operand":32}
  • {"op":"+","operand":3}
  • {"op":"x","operand":2}
  • {"op":"-","operand":11}
Difficulty
hard

Number Chain: 1 → -1 → x2 → -1 → x5 → x2 → ?

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Answer: -10

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

Number Chain: 7 → +12 → +9 → +7 → +7 → -37 → ?

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Answer: 5

SubType
number-chain
Start
7
Steps
  • {"op":"+","operand":12}
  • {"op":"+","operand":9}
  • {"op":"+","operand":7}
  • {"op":"+","operand":7}
  • {"op":"-","operand":37}
Difficulty
hard

Number Chain: 11 → x3 → -14 → +6 → -5 → +4 → ?

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Answer: 24

SubType
number-chain
Start
11
Steps
  • {"op":"x","operand":3}
  • {"op":"-","operand":14}
  • {"op":"+","operand":6}
  • {"op":"-","operand":5}
  • {"op":"+","operand":4}
Difficulty
hard

Number Chain: 8 → x3 → x2 → x5 → +1 → x3 → ?

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Answer: 723

SubType
number-chain
Start
8
Steps
  • {"op":"x","operand":3}
  • {"op":"x","operand":2}
  • {"op":"x","operand":5}
  • {"op":"+","operand":1}
  • {"op":"x","operand":3}
Difficulty
hard

Number Chain: 9 → x3 → +4 → -4 → -8 → x3 → ?

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Answer: 57

SubType
number-chain
Start
9
Steps
  • {"op":"x","operand":3}
  • {"op":"+","operand":4}
  • {"op":"-","operand":4}
  • {"op":"-","operand":8}
  • {"op":"x","operand":3}
Difficulty
hard

Number Chain: 12 → x2 → +10 → x3 → -39 → +11 → ?

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Answer: 74

SubType
number-chain
Start
12
Steps
  • {"op":"x","operand":2}
  • {"op":"+","operand":10}
  • {"op":"x","operand":3}
  • {"op":"-","operand":39}
  • {"op":"+","operand":11}
Difficulty
hard