Tap the number that does not belong (Banking Quant warm-up)

Exercise and reference answers

Questions

1. Items

   1. 16
   2. 30
   3. 25
   4. 49

   Reason

   16, 25 and 49 are perfect squares (4², 5², 7²); 30 is not.

   Odd item

   30

2. Items

   1. 23
   2. 29
   3. 33
   4. 31

   Reason

   23, 29 and 31 are prime; 33 = 3 × 11 is composite.

   Odd item

   33

3. Items

   1. 27
   2. 36
   3. 45
   4. 50

   Reason

   27, 36 and 45 are multiples of 9; 50 is not.

   Odd item

   50

4. Items

   1. 100
   2. 8
   3. 27
   4. 64

   Reason

   8, 27 and 64 are perfect cubes (2³, 3³, 4³); 100 is not.

   Odd item

   100

5. Items

   1. 12
   2. 25
   3. 18
   4. 24

   Reason

   12, 18 and 24 are even; 25 is odd.

   Odd item

   25

Instructions

Tap the number that doesn't fit the rule.