Spot the wrong term in the series

Exercise and reference answers

Questions

1. Statement parts

   1. 5
   2. 10
   3. 20
   4. 35
   5. 80

   Correction

   Doubling pattern needs 40, not 35 (5,10,20,40,80).

   Incorrect part

   35

2. Statement parts

   1. 1
   2. 4
   3. 9
   4. 17
   5. 25

   Correction

   Squares: 1,4,9,16,25. 17 should be 16.

   Incorrect part

   17

3. Statement parts

   1. 4
   2. 9
   3. 16
   4. 23
   5. 36

   Correction

   Squares: 4,9,16,25,36. 23 should be 25.

   Incorrect part

   23