Explanation

6 + 5 = 11

11 + 7 = 18

18 + 9 = 27

Pattern: +5, +7, +9

Last verified on 16-01-2026

Explanation

A+B = 60

B+C = 64

C+A = 68

Add 'em up:

2(A+B+C) = 192

A+B+C = 96

C = (A+B+C) - (A+B)

= 96 - 60

= 36

Last verified on 16-01-2026

Explanation

In spreadsheets or programming, a function is a pre-defined formula that calculates values in a specific order.

Functions simplify calculations by automating repetitive tasks.

They are used in Excel, Google Sheets, and programming languages.

Additional information:

• Examples of functions: SUM(), AVERAGE(), MAX() in Excel.
• Pre-defined formulas save time and reduce errors compared to manual calculations.

Last verified on 16-01-2026

Explanation

• When inserting content from one application into another, there are two main methods: embedding and linking.
• Embedding stores the content directly in the document.
• While linking keeps it connected to the source file.
• Both methods are part of OLE (Object Linking and Embedding) technology in Microsoft Office.

Last verified on 16-01-2026

Explanation

• Pascal’s calculator was called the Pascaline.
• John Mauchly co-invented the ENIAC (first electronic computer) much later.
• Harvard Aliken is unrelated to the first calculator.

Explanation

The World Wide Web was created by combining the internet with hypertext concepts.

It was invented in 1989 to improve information sharing at CERN.

Additional information:

Tim Berners Lee also created HTML, HTTP, and the first web browser.

Explanation

Blank DVDs that allow data to be erased and rewritten multiple times are called DVD+RW.

Standard DVDs can only be written once and cannot be reused.

Rewritable DVDs are useful for backups, software, and data transfer.

Additional information:

• DVD+RW can be rewritten up to 1000 times.
• Standard DVD (DVD-R or DVD+R) can only be written once.
• Rewritable DVDs are commonly used for temporary data storage and software testing.

Last verified on 16-01-2026

Explanation

Aluminum is a metal that can be recycled many times without losing its properties.

Additional information:

• Recycling 1 ton of aluminum saves up to 95% of the energy required to make new aluminum.
• Aluminum is widely used in cans, foils, and packaging, making it highly recyclable.

Last verified on 16-01-2026

Explanation

• Location: Amazon Rainforest, South America
• Area Affected: ~17% of forest lost in last 50 years
• Causes: Agriculture, cattle ranching, logging, urbanization
• Impact: Loss of biodiversity, carbon emissions, climate change

Additional information:

• Amazon forest is called the “lungs of the Earth”

Last verified on 16-01-2026

Explanation

• Main Cause: Freon / CFCs
• Effect: Breaks down O₃ molecules → more UV-B radiation
• Other Contributors: Halons, carbon tetrachloride
• Result: Skin cancer, cataracts, climate impact

• The Montreal Protocol (1987) aimed to reduce CFC emissions
• Ozone layer protects Earth from harmful ultraviolet rays