medium Set 55 Form Exercise

Number Chain: 4 → +3 → x3 → +7 → -26 → ?

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Answer: 2

SubType
number-chain
Start
4
Steps
  • {"op":"+","operand":3}
  • {"op":"x","operand":3}
  • {"op":"+","operand":7}
  • {"op":"-","operand":26}
Difficulty
medium

Number Chain: 9 → x3 → -18 → +10 → -11 → ?

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Answer: 8

SubType
number-chain
Start
9
Steps
  • {"op":"x","operand":3}
  • {"op":"-","operand":18}
  • {"op":"+","operand":10}
  • {"op":"-","operand":11}
Difficulty
medium

Number Chain: 8 → x5 → +3 → x3 → -42 → ?

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Answer: 87

SubType
number-chain
Start
8
Steps
  • {"op":"x","operand":5}
  • {"op":"+","operand":3}
  • {"op":"x","operand":3}
  • {"op":"-","operand":42}
Difficulty
medium

Number Chain: 6 → -5 → -1 → +10 → +1 → ?

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Answer: 11

SubType
number-chain
Start
6
Steps
  • {"op":"-","operand":5}
  • {"op":"-","operand":1}
  • {"op":"+","operand":10}
  • {"op":"+","operand":1}
Difficulty
medium

Number Chain: 8 → +6 → +1 → x4 → +4 → ?

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Answer: 64

SubType
number-chain
Start
8
Steps
  • {"op":"+","operand":6}
  • {"op":"+","operand":1}
  • {"op":"x","operand":4}
  • {"op":"+","operand":4}
Difficulty
medium

Number Chain: 8 → x3 → +3 → -19 → -3 → ?

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Answer: 5

SubType
number-chain
Start
8
Steps
  • {"op":"x","operand":3}
  • {"op":"+","operand":3}
  • {"op":"-","operand":19}
  • {"op":"-","operand":3}
Difficulty
medium

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

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Answer: 1

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

Number Chain: 1 → x2 → +1 → +3 → +3 → ?

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Answer: 9

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