Explanation

• Her doctor will be visited by her by 7:00 PM.
• The object “her doctor” becomes the subject in the passive voice.
• “will visit” changes to “will be visited.”
• “by her” identifies the doer of the action.

Last verified on 12-08-2026

Explanation

• Marconi invented Radio.
• Radio was invented in 1895.
• Guglielmo Marconi was an Italian inventor.

Last verified on 12-08-2026

Explanation

• Oxygen reacts with most elements to produce binary compounds called oxides.
• An oxide is a compound formed when oxygen combines with another element.
• Oxides may be metallic or non-metallic depending on the element involved.
• Examples include CO₂ (carbon dioxide), MgO (magnesium oxide), and Fe₂O₃ (iron oxide).
• Oxides can have acidic, basic, or amphoteric properties.

Last verified on 12-08-2026

Explanation

• Location: London, England
• Big Ben is a clock at British parliament building.
• Architect: Augustus Pugin
• Height: 96 m

Last verified on 12-08-2026

Explanation

• Warsak Dam is located on the Kabul River.
• It was completed under the Colombo Plan .
• Construction began in 1949.
• The Dam was Opened in 1960.
• The height of the dam is 76 m.

Last verified on 30-03-2026

Explanation

• A declarative sentence makes a statement and normally ends with a full stop (.).
• A full stop is also called a period in American English.
• It indicates that the statement is complete.

Additional information:

• A question mark (?) is used at the end of an interrogative sentence.
• An exclamation mark (!) expresses strong emotion or emphasis.

Last verified on 12-08-2026

Explanation

• A projector is an output device used to display video images on a large screen.
• It receives video signals from a computer or other device.
• Projectors are commonly used in classrooms, offices, and presentations.

Additional information:

• A scanner is an input device used to digitize documents and images.
• A printer produces a hard copy of digital information.

Last verified on 12-08-2026

Explanation

• An antivirus software protects a computer against malware and viruses.
• It detects, blocks, and removes harmful software from a computer.
• Common threats include viruses, worms, Trojans, and spyware.
• Antivirus software helps protect files, programs, and system data.
• It can provide real-time protection against new threats.

Last verified on 12-08-2026

Explanation

Rule: If n is odd then a^n + b^n is divisible by a + b

Here n = 43 which is odd  

a = 47 , b = 43  

a + b = 47 + 43 = 90

So 47⁴³ + 43⁴³ is divisible by 90

Last verified on 12-08-2026

Explanation

√2 - 1/√2 = 1/√2

(1/√2)² = 1/2

Last verified on 12-08-2026