Question:

The least number of squares to be added in the figure to make AB a line of symmetry is: \begin{center} \includegraphics[width=6cm]{10.png} \end{center}

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For symmetry problems, focus on mirroring all elements relative to the axis of symmetry.

Updated On: Jan 22, 2025

\( 6 \)
\( 4 \)
\( 5 \)
\( 7 \)

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The Correct Option is A

Solution and Explanation

Step 1: Analyze the figure. The line AB must be a line of symmetry, meaning that for every square above or below AB, there must be a corresponding square on the opposite side, symmetrically placed. Step 2: Add squares. To make the figure symmetric about AB:
Add 2 squares to the leftmost side below AB.
Add 2 squares to the middle section below AB.
Add 2 squares to the rightmost side below AB. Step 3: Total squares to be added. The least number of squares required is: \[ 6 \, \text{squares}. \] Final Answer: \[ \boxed{6 \, \text{squares}} \]

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Questions Asked in GATE CS exam

What is the output of the following C code?

  void foo(int *p, int x) {
      *p = x;
  }

  void main() {
      int *z;
      int a = 20, b = 25;
      z = a;  // Incorrect: Should be z = a;
      foo(z, b);
      printf("%d", a);
  }

Issue: The statement z = a; is invalid because a is an integer, and z is a pointer.

GATE CS - 2025
Trees

View Solution

Consider the following C code:

int main() {
    sum = 0;
    for (n = 1; n < 3; n++) {
        n++;
        sum += g(f(n));
    }
    printf("%d", sum);
}

int g(n) {
    return 10 + n;
}

int f(n) {
    return g(2 * n);
}

What is the output?

GATE CS - 2025
Stacks