David told Jen, "Write three two-digit numbers. I'll add three more and give you the sum right away." Jen wrote 53, 42, and 31. Then David wrote 46, 57, and 68 and said the sum was 297. Was he right? What pattern did he use?

all of them are elements inside set of real numbers since none of them appears to have complex number form.

hope this .

r3t40

answer: 70 is the answer cause if you add all of them together its 70

if you times it is 1,437,696 dogs that is if you times it