1. Calculate the area and perimeter of a rectangle:
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2. Calculate the square root of 99:
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3. Calculate the power of 5 to the 4th:
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4. Set date format to Asia/Karachi and display various date formats:
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5. Perform the arithmetic operation and display the value of x:
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6. Calculate the area and circumference of a circle with a radius of 24:
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7. Find the radius and area of a circular racetrack with a circumference of 1,000 meters:
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8. Convert binary to decimal using PHP functions:
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9. Convert decimal to hexadecimal using PHP functions:
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10. Convert hexadecimal to decimal using PHP functions:
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11. Convert degrees to radians:
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12. Find the largest and smallest numbers:
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13. Convert binary to decimal and then to hexadecimal:
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14. Convert binary to hexadecimal without converting to decimal:
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15. Using echo to display HTML tags
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