hard Set 40 Form Exercise

Number Chain: 11 → +6 → x3 → -4 → +1 → +11 → ?

Show answer

Answer: 59

SubType
number-chain
Start
11
Steps
  • {"op":"+","operand":6}
  • {"op":"x","operand":3}
  • {"op":"-","operand":4}
  • {"op":"+","operand":1}
  • {"op":"+","operand":11}
Difficulty
hard

Number Chain: 10 → -2 → x3 → -4 → x5 → -18 → ?

Show answer

Answer: 82

SubType
number-chain
Start
10
Steps
  • {"op":"-","operand":2}
  • {"op":"x","operand":3}
  • {"op":"-","operand":4}
  • {"op":"x","operand":5}
  • {"op":"-","operand":18}
Difficulty
hard

Number Chain: 4 → x5 → -2 → -3 → +12 → +9 → ?

Show answer

Answer: 36

SubType
number-chain
Start
4
Steps
  • {"op":"x","operand":5}
  • {"op":"-","operand":2}
  • {"op":"-","operand":3}
  • {"op":"+","operand":12}
  • {"op":"+","operand":9}
Difficulty
hard

Number Chain: 7 → +9 → +7 → -11 → +1 → -9 → ?

Show answer

Answer: 4

SubType
number-chain
Start
7
Steps
  • {"op":"+","operand":9}
  • {"op":"+","operand":7}
  • {"op":"-","operand":11}
  • {"op":"+","operand":1}
  • {"op":"-","operand":9}
Difficulty
hard

Number Chain: 8 → +1 → +8 → x5 → +9 → x3 → ?

Show answer

Answer: 282

SubType
number-chain
Start
8
Steps
  • {"op":"+","operand":1}
  • {"op":"+","operand":8}
  • {"op":"x","operand":5}
  • {"op":"+","operand":9}
  • {"op":"x","operand":3}
Difficulty
hard

Number Chain: 12 → x2 → x3 → +5 → +12 → -58 → ?

Show answer

Answer: 31

SubType
number-chain
Start
12
Steps
  • {"op":"x","operand":2}
  • {"op":"x","operand":3}
  • {"op":"+","operand":5}
  • {"op":"+","operand":12}
  • {"op":"-","operand":58}
Difficulty
hard

Number Chain: 2 → -1 → x5 → +10 → +11 → -8 → ?

Show answer

Answer: 18

SubType
number-chain
Start
2
Steps
  • {"op":"-","operand":1}
  • {"op":"x","operand":5}
  • {"op":"+","operand":10}
  • {"op":"+","operand":11}
  • {"op":"-","operand":8}
Difficulty
hard

Number Chain: 2 → -1 → -1 → -1 → x4 → -1 → ?

Show answer

Answer: -5

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