Which one does not belong

Exercise and reference answers

Questions

1. Items

   1. Pascal
   2. Binomial
   3. Pythagoras

   Odd item

   Pythagoras

2. Items

   1. Index vanishes
   2. Index rises
   3. Index falls

   Odd item

   Index vanishes

3. Items

   1. 1 at the start
   2. 2 in the middle
   3. 1 at the end

   Odd item

   2 in the middle

4. Items

   1. 98 to the 5
   2. 101 to the 6
   3. Square root of 2

   Odd item

   Square root of 2

Instructions

Tap the item that does not fit with the others.

Explanation