We use the numbers 1, 2, 3, 4, 5, 6 (each number is used only once) to fill in the circle in the picture on the right. The sum of three numbers on each side of the triangle is 10. If number 1
11/20
We use the numbers 1, 2, 3, 4, 5, 6 (each number is used only once) to fill in the circle in the picture on the right. The sum of three numbers on each side of the triangle is 10. If number 1 is put in the circle as shown in the picture, which number is in the darkened circle?
6
4
3
2
Giải thích
Chọn D