FALSE. This is a common misconception. The significance of zeros depends on their position: (1) Leading zeros (before the first non-zero digit) are NEVER significant. Example: 0.0045 has 2 s.f., not 4. The first two zeros just locate the decimal point. (2) Captive zeros (between non-zero digits) are ALWAYS significant. Example: 1002 has 4 s.f. (3) Trailing zeros AFTER a decimal point are ALWAYS significant. Example: 12.00 has 4 s.f. (4) Trailing zeros in whole numbers WITHOUT a decimal point are ambiguous. Example: 1200 could have 2, 3, or 4 s.f. Understanding these rules is essential for ECZ exams, particularly in Paper 2 where calculations involve measurements and experimental data. Many students lose marks by counting all zeros as significant.

Break down complex topics into smaller, manageable chunks for easier recall.

Zambia

• ivwananji siwale – 29 pts

• Distance of A Straight Line
• Mid-point of A Line
• Equation of a Straight Line
• Parallel and Perpendicular Lines
• COMMUNICATION SYSTEMS