Skm ∥ jn? why or why not?
no, because 16/10 ≠ 24/15.
yes, because 10/24 = 15/16.
yes, because 16/10 = 15/24
yes, because 16/10 = 24/15.

This is the concept of linear proportionality, triangle JLN and triangle KLM are similar, this implies that:
KL/KJ=ML/MN
which implies that:
16/10=24/15
therefore we conclude that the answer is :
Yes, because 16/10=24/15

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)