hard Set 19 Form Exercise

Number Chain: 12 → +10 → x5 → +4 → +3 → x4 → ?

Show answer

Answer: 468

SubType
number-chain
Start
12
Steps
  • {"op":"+","operand":10}
  • {"op":"x","operand":5}
  • {"op":"+","operand":4}
  • {"op":"+","operand":3}
  • {"op":"x","operand":4}
Difficulty
hard

Number Chain: 10 → +4 → +9 → x5 → -81 → -31 → ?

Show answer

Answer: 3

SubType
number-chain
Start
10
Steps
  • {"op":"+","operand":4}
  • {"op":"+","operand":9}
  • {"op":"x","operand":5}
  • {"op":"-","operand":81}
  • {"op":"-","operand":31}
Difficulty
hard

Number Chain: 3 → +12 → +2 → x2 → +9 → -10 → ?

Show answer

Answer: 33

SubType
number-chain
Start
3
Steps
  • {"op":"+","operand":12}
  • {"op":"+","operand":2}
  • {"op":"x","operand":2}
  • {"op":"+","operand":9}
  • {"op":"-","operand":10}
Difficulty
hard

Number Chain: 6 → +10 → x4 → x3 → -7 → -28 → ?

Show answer

Answer: 157

SubType
number-chain
Start
6
Steps
  • {"op":"+","operand":10}
  • {"op":"x","operand":4}
  • {"op":"x","operand":3}
  • {"op":"-","operand":7}
  • {"op":"-","operand":28}
Difficulty
hard

Number Chain: 3 → x4 → x4 → -45 → -1 → x3 → ?

Show answer

Answer: 6

SubType
number-chain
Start
3
Steps
  • {"op":"x","operand":4}
  • {"op":"x","operand":4}
  • {"op":"-","operand":45}
  • {"op":"-","operand":1}
  • {"op":"x","operand":3}
Difficulty
hard

Number Chain: 5 → -4 → x3 → +5 → +6 → x3 → ?

Show answer

Answer: 42

SubType
number-chain
Start
5
Steps
  • {"op":"-","operand":4}
  • {"op":"x","operand":3}
  • {"op":"+","operand":5}
  • {"op":"+","operand":6}
  • {"op":"x","operand":3}
Difficulty
hard

Number Chain: 5 → +12 → +2 → x5 → -27 → -49 → ?

Show answer

Answer: 19

SubType
number-chain
Start
5
Steps
  • {"op":"+","operand":12}
  • {"op":"+","operand":2}
  • {"op":"x","operand":5}
  • {"op":"-","operand":27}
  • {"op":"-","operand":49}
Difficulty
hard

Number Chain: 7 → x5 → x4 → x3 → +3 → +7 → ?

Show answer

Answer: 430

SubType
number-chain
Start
7
Steps
  • {"op":"x","operand":5}
  • {"op":"x","operand":4}
  • {"op":"x","operand":3}
  • {"op":"+","operand":3}
  • {"op":"+","operand":7}
Difficulty
hard