Question

[La Ho Thi Minh Khue]

Question 1:In a magic triangle, each of the six whole numbers 10; 11; 12; 13; 14; 15 is placed in one of the circles so that the sum, S, of the three numbers on each side of the triangle is the same. The largest possible value for S is____

Q2:Find the highest common factor of 147x and 98y if HCF(x;y)=1

Q3: A pattern of triangles is made from matches shown as follows

if there are 207 matches used, how many triangles has been formed

Answer 1

[Hồ Việt Bảo Long]

Q1 có ai dịch đề dùm k ạ