In a class, there are 529 students who are arranged in rows and columns to form a square for a P.T display. Now the teacher wants to add one more row and column for which 60 more students volunteer. Find the number of students who will not be part of the P.T display.

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Solution

The correct option is D
13

Original number of rows and columns= $\sqrt{529}$ = 23
Required number of rows and columns = 23 + 1 = 24
Number of students required in P.T display now = $24^{2}$ = 576
Extra students needed = 47 (576 - 529)
Number of students not selected for PT display = 60 - 47 = 13

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In a class, there are 529 students who are arranged in rows and columns to form a square for a P.T display. Now the teacher wants to add one more row and column for which 60 more students volunteer. Find the number of students who will not be part of the P.T display.

The correct option is D 13 Original number of rows and columns= √529 = 23 Required number of rows and columns = 23 + 1 = 24 Number of students required in P.T display now = 242 = 576 Extra students needed = 47 (576 - 529) Number of students not selected for PT display = 60 - 47 = 13

The correct option is D
13

Original number of rows and columns= $\sqrt{529}$ = 23
Required number of rows and columns = 23 + 1 = 24
Number of students required in P.T display now = $24^{2}$ = 576
Extra students needed = 47 (576 - 529)
Number of students not selected for PT display = 60 - 47 = 13