hard Set 98 Form Exercise

Number Chain: 7 → x5 → -8 → -12 → -11 → x3 → ?

Show answer

Answer: 12

SubType
number-chain
Start
7
Steps
  • {"op":"x","operand":5}
  • {"op":"-","operand":8}
  • {"op":"-","operand":12}
  • {"op":"-","operand":11}
  • {"op":"x","operand":3}
Difficulty
hard

Number Chain: 10 → -6 → x2 → +10 → -6 → x5 → ?

Show answer

Answer: 60

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

Number Chain: 8 → -1 → -1 → -5 → x2 → x5 → ?

Show answer

Answer: 10

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

Number Chain: 6 → x5 → -17 → -1 → x5 → +4 → ?

Show answer

Answer: 64

SubType
number-chain
Start
6
Steps
  • {"op":"x","operand":5}
  • {"op":"-","operand":17}
  • {"op":"-","operand":1}
  • {"op":"x","operand":5}
  • {"op":"+","operand":4}
Difficulty
hard

Number Chain: 5 → -2 → +2 → -4 → x2 → -1 → ?

Show answer

Answer: 1

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

Number Chain: 10 → -8 → -1 → -1 → -1 → -1 → ?

Show answer

Answer: -2

SubType
number-chain
Start
10
Steps
  • {"op":"-","operand":8}
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
  • {"op":"-","operand":1}
Difficulty
hard

Number Chain: 1 → +10 → +9 → -9 → +7 → +12 → ?

Show answer

Answer: 30

SubType
number-chain
Start
1
Steps
  • {"op":"+","operand":10}
  • {"op":"+","operand":9}
  • {"op":"-","operand":9}
  • {"op":"+","operand":7}
  • {"op":"+","operand":12}
Difficulty
hard

Number Chain: 12 → -8 → -2 → -1 → +7 → -3 → ?

Show answer

Answer: 5

SubType
number-chain
Start
12
Steps
  • {"op":"-","operand":8}
  • {"op":"-","operand":2}
  • {"op":"-","operand":1}
  • {"op":"+","operand":7}
  • {"op":"-","operand":3}
Difficulty
hard