easy Set 89 Form Exercise

Number Chain: 5 → -1 → -1 → +10 → ?

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Answer: 13

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

Number Chain: 5 → +10 → +9 → -21 → ?

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Answer: 3

SubType
number-chain
Start
5
Steps
  • {"op":"+","operand":10}
  • {"op":"+","operand":9}
  • {"op":"-","operand":21}
Difficulty
easy

Number Chain: 5 → +10 → -11 → +10 → ?

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Answer: 14

SubType
number-chain
Start
5
Steps
  • {"op":"+","operand":10}
  • {"op":"-","operand":11}
  • {"op":"+","operand":10}
Difficulty
easy

Number Chain: 6 → +1 → -5 → -1 → ?

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Answer: 1

SubType
number-chain
Start
6
Steps
  • {"op":"+","operand":1}
  • {"op":"-","operand":5}
  • {"op":"-","operand":1}
Difficulty
easy

Number Chain: 4 → -3 → -1 → -1 → ?

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Answer: -1

SubType
number-chain
Start
4
Steps
  • {"op":"-","operand":3}
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
Difficulty
easy

Number Chain: 6 → +5 → -5 → -4 → ?

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Answer: 2

SubType
number-chain
Start
6
Steps
  • {"op":"+","operand":5}
  • {"op":"-","operand":5}
  • {"op":"-","operand":4}
Difficulty
easy

Number Chain: 5 → +4 → -8 → +6 → ?

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Answer: 7

SubType
number-chain
Start
5
Steps
  • {"op":"+","operand":4}
  • {"op":"-","operand":8}
  • {"op":"+","operand":6}
Difficulty
easy

Number Chain: 9 → +1 → -4 → +9 → ?

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Answer: 15

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