medium Set 70 Form Exercise

Number Chain: 10 → +3 → x3 → -1 → x5 → ?

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Answer: 190

SubType
number-chain
Start
10
Steps
  • {"op":"+","operand":3}
  • {"op":"x","operand":3}
  • {"op":"-","operand":1}
  • {"op":"x","operand":5}
Difficulty
medium

Number Chain: 8 → -6 → +1 → -1 → +6 → ?

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Answer: 8

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

Number Chain: 5 → x4 → +7 → x4 → x3 → ?

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Answer: 324

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

Number Chain: 2 → -1 → x5 → +5 → -8 → ?

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Answer: 2

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

Number Chain: 7 → +1 → x4 → x4 → -20 → ?

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Answer: 108

SubType
number-chain
Start
7
Steps
  • {"op":"+","operand":1}
  • {"op":"x","operand":4}
  • {"op":"x","operand":4}
  • {"op":"-","operand":20}
Difficulty
medium

Number Chain: 5 → -1 → +6 → x2 → -7 → ?

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Answer: 13

SubType
number-chain
Start
5
Steps
  • {"op":"-","operand":1}
  • {"op":"+","operand":6}
  • {"op":"x","operand":2}
  • {"op":"-","operand":7}
Difficulty
medium

Number Chain: 10 → -7 → +3 → +6 → -5 → ?

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Answer: 7

SubType
number-chain
Start
10
Steps
  • {"op":"-","operand":7}
  • {"op":"+","operand":3}
  • {"op":"+","operand":6}
  • {"op":"-","operand":5}
Difficulty
medium

Number Chain: 9 → +3 → x2 → -11 → -7 → ?

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Answer: 6

SubType
number-chain
Start
9
Steps
  • {"op":"+","operand":3}
  • {"op":"x","operand":2}
  • {"op":"-","operand":11}
  • {"op":"-","operand":7}
Difficulty
medium