hard Set 56 Form Exercise

Number Chain: 2 → +7 → x2 → -17 → x5 → +12 → ?

Show answer

Answer: 17

SubType
number-chain
Start
2
Steps
  • {"op":"+","operand":7}
  • {"op":"x","operand":2}
  • {"op":"-","operand":17}
  • {"op":"x","operand":5}
  • {"op":"+","operand":12}
Difficulty
hard

Number Chain: 9 → +11 → x5 → -94 → +12 → -12 → ?

Show answer

Answer: 6

SubType
number-chain
Start
9
Steps
  • {"op":"+","operand":11}
  • {"op":"x","operand":5}
  • {"op":"-","operand":94}
  • {"op":"+","operand":12}
  • {"op":"-","operand":12}
Difficulty
hard

Number Chain: 5 → -4 → +6 → +10 → +5 → x2 → ?

Show answer

Answer: 44

SubType
number-chain
Start
5
Steps
  • {"op":"-","operand":4}
  • {"op":"+","operand":6}
  • {"op":"+","operand":10}
  • {"op":"+","operand":5}
  • {"op":"x","operand":2}
Difficulty
hard

Number Chain: 1 → +2 → x5 → x3 → -31 → -3 → ?

Show answer

Answer: 11

SubType
number-chain
Start
1
Steps
  • {"op":"+","operand":2}
  • {"op":"x","operand":5}
  • {"op":"x","operand":3}
  • {"op":"-","operand":31}
  • {"op":"-","operand":3}
Difficulty
hard

Number Chain: 5 → -2 → -2 → -1 → +4 → -1 → ?

Show answer

Answer: 3

SubType
number-chain
Start
5
Steps
  • {"op":"-","operand":2}
  • {"op":"-","operand":2}
  • {"op":"-","operand":1}
  • {"op":"+","operand":4}
  • {"op":"-","operand":1}
Difficulty
hard

Number Chain: 4 → -1 → x5 → +6 → +5 → +5 → ?

Show answer

Answer: 31

SubType
number-chain
Start
4
Steps
  • {"op":"-","operand":1}
  • {"op":"x","operand":5}
  • {"op":"+","operand":6}
  • {"op":"+","operand":5}
  • {"op":"+","operand":5}
Difficulty
hard

Number Chain: 8 → +5 → x3 → x2 → +3 → +4 → ?

Show answer

Answer: 85

SubType
number-chain
Start
8
Steps
  • {"op":"+","operand":5}
  • {"op":"x","operand":3}
  • {"op":"x","operand":2}
  • {"op":"+","operand":3}
  • {"op":"+","operand":4}
Difficulty
hard

Number Chain: 3 → -2 → +2 → -2 → -1 → -1 → ?

Show answer

Answer: -1

SubType
number-chain
Start
3
Steps
  • {"op":"-","operand":2}
  • {"op":"+","operand":2}
  • {"op":"-","operand":2}
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
Difficulty
hard