easy Set 99 Form Exercise

Number Chain: 6 → +10 → +5 → -19 → ?

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Answer: 2

SubType
number-chain
Start
6
Steps
  • {"op":"+","operand":10}
  • {"op":"+","operand":5}
  • {"op":"-","operand":19}
Difficulty
easy

Number Chain: 10 → -3 → -3 → +8 → ?

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Answer: 12

SubType
number-chain
Start
10
Steps
  • {"op":"-","operand":3}
  • {"op":"-","operand":3}
  • {"op":"+","operand":8}
Difficulty
easy

Number Chain: 9 → -8 → +3 → -2 → ?

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Answer: 2

SubType
number-chain
Start
9
Steps
  • {"op":"-","operand":8}
  • {"op":"+","operand":3}
  • {"op":"-","operand":2}
Difficulty
easy

Number Chain: 7 → +1 → -7 → -1 → ?

SubType
number-chain
Start
7
Steps
  • {"op":"+","operand":1}
  • {"op":"-","operand":7}
  • {"op":"-","operand":1}
Difficulty
easy

Number Chain: 2 → +3 → -2 → +1 → ?

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Answer: 4

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

Number Chain: 10 → -1 → -7 → +4 → ?

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Answer: 6

SubType
number-chain
Start
10
Steps
  • {"op":"-","operand":1}
  • {"op":"-","operand":7}
  • {"op":"+","operand":4}
Difficulty
easy

Number Chain: 9 → +9 → +6 → +6 → ?

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Answer: 30

SubType
number-chain
Start
9
Steps
  • {"op":"+","operand":9}
  • {"op":"+","operand":6}
  • {"op":"+","operand":6}
Difficulty
easy

Number Chain: 4 → -3 → +8 → +3 → ?

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Answer: 12

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