easy Set 80 Form Exercise

Number Chain: 4 → +9 → -11 → +10 → ?

Show answer

Answer: 12

SubType
number-chain
Start
4
Steps
  • {"op":"+","operand":9}
  • {"op":"-","operand":11}
  • {"op":"+","operand":10}
Difficulty
easy

Number Chain: 2 → -1 → +9 → -5 → ?

Show answer

Answer: 5

SubType
number-chain
Start
2
Steps
  • {"op":"-","operand":1}
  • {"op":"+","operand":9}
  • {"op":"-","operand":5}
Difficulty
easy

Number Chain: 10 → -6 → +5 → +1 → ?

Show answer

Answer: 10

SubType
number-chain
Start
10
Steps
  • {"op":"-","operand":6}
  • {"op":"+","operand":5}
  • {"op":"+","operand":1}
Difficulty
easy

Number Chain: 8 → -2 → -5 → +10 → ?

Show answer

Answer: 11

SubType
number-chain
Start
8
Steps
  • {"op":"-","operand":2}
  • {"op":"-","operand":5}
  • {"op":"+","operand":10}
Difficulty
easy

Number Chain: 8 → +5 → -3 → -3 → ?

Show answer

Answer: 7

SubType
number-chain
Start
8
Steps
  • {"op":"+","operand":5}
  • {"op":"-","operand":3}
  • {"op":"-","operand":3}
Difficulty
easy

Number Chain: 2 → +5 → +10 → +4 → ?

Show answer

Answer: 21

SubType
number-chain
Start
2
Steps
  • {"op":"+","operand":5}
  • {"op":"+","operand":10}
  • {"op":"+","operand":4}
Difficulty
easy

Number Chain: 8 → -5 → +8 → +6 → ?

Show answer

Answer: 17

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

Number Chain: 10 → +1 → -2 → +5 → ?

Show answer

Answer: 14

SubType
number-chain
Start
10
Steps
  • {"op":"+","operand":1}
  • {"op":"-","operand":2}
  • {"op":"+","operand":5}
Difficulty
easy