Seven men have seven wives each man and wife have seven children what are the number of people?

21 people

Step-by-step explanation:

given data

men = 7

wife = 7

children = 7

solution

As given each man and each wife means a couple

and they have 7 children

so

a total of 7 couples has had 1 child each

This makes it 7 Men + 7Wives + 7 Children = 21 People  

Therefore

here total people is 7 Men have 7 Wives Riddle is 21 People

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.