Common among the uncommon

Question

What is common among the seemingly uncommmon among the following:

1. One of the types of human blood groups

2. Grading representation in schools

3. Part of alternate representation for Like/ up vote

4. Mother of all numerical operations, well, considered in a way

5. That type of growth usually goes up and right

   ?

Answer 1

The common factor is

+ (the plus sign)

1. Blood type

   For the gene A, B, or O, you can have a positive (+) or negative (-) type.

2. Grading representation

   For each letter grade (A, B, C, etc.) some schools assign plus or minus for granularity. For example, A+ > A > A- > B+ > B, and so on.

3. Like/upvote

   An upvote are sometimes referred to as +1 (plus one vote).

4. Operators

   Addition (X + Y) is one of the first mathematical operations that people learn. Subtraction is negative addition, and multiplication is repeated addition.

5. Growth

   A monotonic function with a positive rate moves up and right. For example, in the function y=2x, the rate is +2 (positive); and when you visualize the graph, the value of y moves up as you move right along the x axis.

Answer 2

The pattern is:

The first 5 letters of the alphabet

1)

A is a blood group

2)

B is a grade that is given in schools

3)

Unsure

4)

D for differentials/derivatives

5)

E for exponential graph - which is a graph that is always growing... i.e. up and to the right