easy Set 64 Form Exercise

Number Chain: 10 → -1 → -5 → +9 → ?

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Answer: 13

SubType
number-chain
Start
10
Steps
  • {"op":"-","operand":1}
  • {"op":"-","operand":5}
  • {"op":"+","operand":9}
Difficulty
easy

Number Chain: 3 → +3 → -1 → +10 → ?

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Answer: 15

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

Number Chain: 4 → -2 → -1 → -1 → ?

SubType
number-chain
Start
4
Steps
  • {"op":"-","operand":2}
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
Difficulty
easy

Number Chain: 3 → +4 → +6 → +9 → ?

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Answer: 22

SubType
number-chain
Start
3
Steps
  • {"op":"+","operand":4}
  • {"op":"+","operand":6}
  • {"op":"+","operand":9}
Difficulty
easy

Number Chain: 2 → -1 → +2 → +1 → ?

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Answer: 4

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

Number Chain: 5 → +3 → +3 → -5 → ?

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Answer: 6

SubType
number-chain
Start
5
Steps
  • {"op":"+","operand":3}
  • {"op":"+","operand":3}
  • {"op":"-","operand":5}
Difficulty
easy

Number Chain: 7 → -6 → +8 → +7 → ?

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Answer: 16

SubType
number-chain
Start
7
Steps
  • {"op":"-","operand":6}
  • {"op":"+","operand":8}
  • {"op":"+","operand":7}
Difficulty
easy

Number Chain: 9 → -3 → -1 → -2 → ?

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Answer: 3

SubType
number-chain
Start
9
Steps
  • {"op":"-","operand":3}
  • {"op":"-","operand":1}
  • {"op":"-","operand":2}
Difficulty
easy