Explanation

Let the 3-digit number be abc = 100a + 10b + c  

Reversed = cba = 100c + 10b + a  

Given: reversed - original = 297  

(100c + 10b + a) - (100a + 10b + c) = 297  

99c - 99a = 297 → 99(c - a) = 297 → c - a = 3  

Also given: a + c = 7  

Solve:  

a + c = 7  

c - a = 3  

Add both: 2c = 10 → c = 5  

Then a = 7 - 5 = 2  

Product of first and third digits = a × c = 2 × 5 = 10.

Last verified on 23-06-2026

Explanation

• Regression Testing checks that new changes do not break or damage existing code.
• It ensures previous features, design, and functionality remain stable.
• It is mainly used after updates or bug fixes.

Last verified 23-06-2026

Explanation

• Rectified spirit contains about 95% ethyl alcohol.
• It is highly purified alcohol obtained by repeated distillation.
• The remaining percentage is usually water.
• It is used in pharmaceuticals, laboratories, and industrial processes.

Last verified on 23-06-2026

Explanation

• Tourmaline is found in Chitral, Pakistan as a semi-precious gemstone.
• It is a valuable mineral used in jewelry due to its attractive colors.
• Chitral is rich in pegmatite rock formations where gemstones occur.
• Tourmaline is known for its multi-colored crystal varieties.

Last verified on 23-06-2026

Explanation

Use identity: (a + 1)(a - 1) = a² - 1  

Here 201 × 199 = (200 + 1)(200 - 1) = 200² - 1²  

= 40000 - 1  

= 39999  

Last verified on 23-06-2026

Explanation

• The correct idiom is “A drowning man catches at a straw.”
• It means a person in danger tries any possible small hope for survival.
• A drowning man catches at a straw means ڈوبتے کو تنکے کا سہارا۔

Last verified on 23-06-2026

Explanation

• Location: Lahore, Punjab, Pakistan
• Built: 1642 AD
• Emperor Era: Mughal Empire Shah Jahan
• Commissioned by: Hakim Ilm-ud-din Ansari (Wazir Khan)

Last verified on 23-06-2026

Explanation

• Quick Sort is the fastest in the average case among the given options.
• It has an average time complexity of O(n log n).
• It uses a divide-and-conquer strategy to sort data efficiently.

Last verified on 23-06-2026

Explanation

• Sir Muhammad Zafrullah Khan was the first Foreign Minister of Pakistan.
• He served from 27 December 1947 to 24 October 1954.
• Preceded by: Liaquat Ali Khan (acting role before formal ministry setup)
• Succeeded by: Muhammad Ali Bogra
• Party: All India Muslim League

Last verified on 23-06-2026

Explanation

• The armor “Al-Bayda” obtained in the Battle of Badr was given to Hazrat Sa’d bin Abi Waqqas (RA) by Prophet Muhammad ﷺ.
• Hazrat Sa’d (RA) was a brave companion and skilled archer.
• He was a member of Ashra Mubashra.
• The Battle of Badr took place in 624 AD (2 AH).

Last verified on 23-06-2026