Explanation

Let's denote Huma's age as x and Ali's age as y.

The given situation translates to:

2x + 3y = 54

This equation directly matches one of the options.

The answer is 2x + 3y = 54.

Explanation

Chymosin is an enzyme used as a clotting agent in the production of GMO cheese, helping to coagulate milk.

It is often produced using genetically modified microorganisms to ensure consistent quality and supply.

Explanation

The reporting verb "said" is in past tense, so the tense in the reported speech changes.

"Am" changes to "was", and "now" changes to "then".

So, "I am busy now" becomes "he was busy then" in indirect speech.

Explanation

In the Concrete Operational Stage (ages 7–11), children start thinking logically about concrete events.

They can understand concepts like conservation, time, space, and quantity, helping them manage their surroundings better.

Explanation

Khadija is thrice as old as her daughter, so:

K = 3D

The sum of their ages is 45:

K + D = 45

3D + D = 45

4D = 45

D = 45/4

D = 11.25 (12)

Explanation

The <sup> tag in HTML is used to define superscript text, which appears slightly above the normal line (e.g., x²).

Commonly used for mathematical exponents and footnote references.

Explanation

The phrase "by means of" means "with the help of" or "using", which fits the sentence perfectly.

The sentence becomes: "The work was done by means of the help of volunteers."

Explanation

Pantomime is a silent drama technique that uses only facial expressions, body movements, and gestures to convey actions or emotions.

It is often used in theatre and teaching to enhance creativity and non-verbal communication skills.

Explanation

Dengue fever causes a significant drop in platelet count (thrombocytopenia), which can lead to internal bleeding and complications.

Monitoring platelet levels is critical in managing dengue patients, especially during severe stages.

Explanation

Cities bombed: Hiroshima and Nagasaki

Dates:

• Hiroshima – August 6, 1945
• Nagasaki – August 9, 1945

Bomb types:

• Hiroshima – Little Boy
• Nagasaki – Fat Man

Deaths:

• Hiroshima – around 40,000
• Nagasaki – around 80,000

Result: Led to Japan’s surrender and end of World War II.