hard Set 38 Form Exercise

Number Chain: 12 → -2 → x5 → -45 → +2 → -2 → ?

Show answer

Answer: 5

SubType
number-chain
Start
12
Steps
  • {"op":"-","operand":2}
  • {"op":"x","operand":5}
  • {"op":"-","operand":45}
  • {"op":"+","operand":2}
  • {"op":"-","operand":2}
Difficulty
hard

Number Chain: 1 → +11 → x5 → -37 → -18 → x4 → ?

Show answer

Answer: 20

SubType
number-chain
Start
1
Steps
  • {"op":"+","operand":11}
  • {"op":"x","operand":5}
  • {"op":"-","operand":37}
  • {"op":"-","operand":18}
  • {"op":"x","operand":4}
Difficulty
hard

Number Chain: 6 → +6 → -9 → x5 → x5 → x5 → ?

Show answer

Answer: 375

SubType
number-chain
Start
6
Steps
  • {"op":"+","operand":6}
  • {"op":"-","operand":9}
  • {"op":"x","operand":5}
  • {"op":"x","operand":5}
  • {"op":"x","operand":5}
Difficulty
hard

Number Chain: 4 → x2 → +10 → -11 → +1 → +1 → ?

Show answer

Answer: 9

SubType
number-chain
Start
4
Steps
  • {"op":"x","operand":2}
  • {"op":"+","operand":10}
  • {"op":"-","operand":11}
  • {"op":"+","operand":1}
  • {"op":"+","operand":1}
Difficulty
hard

Number Chain: 11 → x2 → -9 → -8 → +4 → -4 → ?

Show answer

Answer: 5

SubType
number-chain
Start
11
Steps
  • {"op":"x","operand":2}
  • {"op":"-","operand":9}
  • {"op":"-","operand":8}
  • {"op":"+","operand":4}
  • {"op":"-","operand":4}
Difficulty
hard

Number Chain: 8 → +2 → x5 → -11 → -13 → +1 → ?

Show answer

Answer: 27

SubType
number-chain
Start
8
Steps
  • {"op":"+","operand":2}
  • {"op":"x","operand":5}
  • {"op":"-","operand":11}
  • {"op":"-","operand":13}
  • {"op":"+","operand":1}
Difficulty
hard

Number Chain: 3 → +2 → +12 → +3 → -10 → -5 → ?

Show answer

Answer: 5

SubType
number-chain
Start
3
Steps
  • {"op":"+","operand":2}
  • {"op":"+","operand":12}
  • {"op":"+","operand":3}
  • {"op":"-","operand":10}
  • {"op":"-","operand":5}
Difficulty
hard

Number Chain: 12 → x2 → -13 → x3 → x2 → x5 → ?

Show answer

Answer: 330

SubType
number-chain
Start
12
Steps
  • {"op":"x","operand":2}
  • {"op":"-","operand":13}
  • {"op":"x","operand":3}
  • {"op":"x","operand":2}
  • {"op":"x","operand":5}
Difficulty
hard