easy Set 87 Form Exercise

Number Chain: 1 → -1 → -1 → +3 → ?

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Answer: 2

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

Number Chain: 8 → +6 → +3 → -4 → ?

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Answer: 13

SubType
number-chain
Start
8
Steps
  • {"op":"+","operand":6}
  • {"op":"+","operand":3}
  • {"op":"-","operand":4}
Difficulty
easy

Number Chain: 10 → +7 → +8 → +10 → ?

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Answer: 35

SubType
number-chain
Start
10
Steps
  • {"op":"+","operand":7}
  • {"op":"+","operand":8}
  • {"op":"+","operand":10}
Difficulty
easy

Number Chain: 10 → +2 → +4 → -7 → ?

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Answer: 9

SubType
number-chain
Start
10
Steps
  • {"op":"+","operand":2}
  • {"op":"+","operand":4}
  • {"op":"-","operand":7}
Difficulty
easy

Number Chain: 8 → +3 → -8 → -1 → ?

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Answer: 2

SubType
number-chain
Start
8
Steps
  • {"op":"+","operand":3}
  • {"op":"-","operand":8}
  • {"op":"-","operand":1}
Difficulty
easy

Number Chain: 1 → +3 → +9 → -9 → ?

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Answer: 4

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

Number Chain: 7 → -3 → +10 → +1 → ?

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Answer: 15

SubType
number-chain
Start
7
Steps
  • {"op":"-","operand":3}
  • {"op":"+","operand":10}
  • {"op":"+","operand":1}
Difficulty
easy

Number Chain: 8 → +10 → -13 → +7 → ?

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Answer: 12

SubType
number-chain
Start
8
Steps
  • {"op":"+","operand":10}
  • {"op":"-","operand":13}
  • {"op":"+","operand":7}
Difficulty
easy