Answer:
13
Step-by-step explanation:
If Maryam has 13 T-Shirts and 26 buttons
The possible combination into identical pieces with no piece left over is determined by the Highest Common Factor of the two numbers.
To find the Highest Common Factor of 13 and 26
Express each number as a product of its prime factors.
13= 13
26 = 2 X 13
Next pick the common terms which is only 13 in this case.
H.C.F=13
The greatest number Maryam can make is 13 identical sets.