What are the possible values digits A and B can take for ⎛⎜ ⎜⎝1A−BB⎞⎟ ⎟⎠ to hold true.
2 and 6
4 and 7
8 and 9
All of these
1A - B = B
Construction of a unique quadrilateral ABCD is possible with AB = 4cm, BC = 6cm, AC = 7cm, CD = 5cm and BD = 8cm.