Explanation

To find the greatest prime factor of 87:

Step 1: Factorize 87

87 = 3 × 29

Step 2: Identify the prime factors  

- 3 is a prime number  

- 29 is a prime number

Explanation

- Cost of 1 egg = 60 ÷ 9 = Rs. 6.67

- Cost of 3 eggs = 6.67 × 3

= Rs. 20

Explanation

To find 15% of 168:

= (15/100) × 168  

= 0.15 × 168  

= 25.2

Explanation

(7/8) × 96 = 84 

Explanation

Fe in a fused mixture of Al2O3, SiO2, and MgO is a highly suitable catalyst for ammonia synthesis;

This combination is often used as a support material for the iron catalyst in the Haber process, enhancing its activity and stability. 

Explanation

All numbers except 50 are perfect squares:

- 81 = 9²  

- 64 = 8²  

- 36 = 6²  

- 25 = 5²  

Explanation

Profit = Selling Price − Cost Price  

= 11,000 − 10,000 = 1,000

Profit % = (Profit / Cost Price) × 100  

= (1,000 / 10,000) × 100 = 10%

Explanation

Sindh is known as Bab-ul-Islam (the gateway of Islam), as it saw the first spread of Islam into South Asia.

Sindh is the third-largest province of Pakistan by land area

Sindh is the second-largest province by population after Punjab

The Sindhi language is the oldest language

Sindhi is written in a version of the Arabic script.

Sindhi is the official language of the Pakistani province of Sindh.

Sindh has 30 Districts and 7 district

There are three Barrages in Sindh

The mountain range located in Sindh is Kirthar Range

N

Explanation

 Bleaching powder is chemically known as calcium oxychloride 

Chemical formula CaOCl₂.

It is used as a disinfectant and bleaching agent.

Explanation

 The centripetal force keeps an object moving in a circular path.  

- Its formula is F = mv² / r, where:  

  - m = mass of the object  

  - v = velocity  

  - r = radius of the circular path  

- It always acts towards the center of the circle.  

- Example: A stone tied to a string and rotated in a circle — the string provides centripetal force.