easy Set 99 Form Exercise

Number Chain: 9 → +4 → +6 → +2 → ?

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Answer: 21

SubType
number-chain
Start
9
Steps
  • {"op":"+","operand":4}
  • {"op":"+","operand":6}
  • {"op":"+","operand":2}
Difficulty
easy

Number Chain: 4 → +7 → -8 → +7 → ?

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Answer: 10

SubType
number-chain
Start
4
Steps
  • {"op":"+","operand":7}
  • {"op":"-","operand":8}
  • {"op":"+","operand":7}
Difficulty
easy

Number Chain: 4 → +6 → +9 → -16 → ?

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Answer: 3

SubType
number-chain
Start
4
Steps
  • {"op":"+","operand":6}
  • {"op":"+","operand":9}
  • {"op":"-","operand":16}
Difficulty
easy

Number Chain: 5 → +7 → +4 → +8 → ?

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Answer: 24

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

Number Chain: 7 → -5 → +1 → +5 → ?

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Answer: 8

SubType
number-chain
Start
7
Steps
  • {"op":"-","operand":5}
  • {"op":"+","operand":1}
  • {"op":"+","operand":5}
Difficulty
easy

Number Chain: 10 → +8 → -6 → +8 → ?

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Answer: 20

SubType
number-chain
Start
10
Steps
  • {"op":"+","operand":8}
  • {"op":"-","operand":6}
  • {"op":"+","operand":8}
Difficulty
easy

Number Chain: 7 → -5 → +6 → -7 → ?

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Answer: 1

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

Number Chain: 8 → +4 → -9 → -1 → ?

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Answer: 2

SubType
number-chain
Start
8
Steps
  • {"op":"+","operand":4}
  • {"op":"-","operand":9}
  • {"op":"-","operand":1}
Difficulty
easy