{(2,1), (4,2) (6,3) (8,4)} is what type of relation? a. many-to-many
b. one-to-many
c. many-to-one
d. one-to-one

this is an example

Step-by-step explanation:

40.

The pattern is the sum of the two numbers plus the previous sum, i.e.

12 = 2+5 (+5)

21 = 3+6 (+12)

40 = 8+11 (+21)

These type of questions are part of reasoning and comes in random competitive exams which have multiple choice questions and therefore you have more than you want.

First you need to multiply both numbers and then add with the first number.

Therefore

1+4= 1x4+1=5

2+5=2×5+2=12

3+6=3×6+3=21

Hence

8+11=8×11+8=96

The other solution for this problem is given below.

Solution for this is:

1+4=5

1(4+1)=1(5)=5

2+5=12

2(5+1)=2(6)=12

3+6=21

3(6+1)=3(7)=21

Therefore…

8+11

8(11+1)=8(12)=96

what level of math? also i don't need to be paid if i can you.