Explanation

Natural Number: The number 1 is considered a natural number (used for counting: 1, 2, 3, ...).

Explanation

We use the relation:

Product of two numbers = LCM × HCF

Given:

Product = 2500

LCM = 125

So,

2500 = 125 × HCF

⇒ HCF = 2500 ÷ 125 = 20

Explanation

Water makes up about 70% of the cell's composition.

It is crucial for various cellular processes, including biochemical reactions and maintaining cell structure.

Explanation

Ibn Sina (Avicenna) is often called the "Aristotle of the Muslim world" for his vast contributions to philosophy and science.

He blended Greek philosophy, especially Aristotle's ideas, with Islamic thought in his works.

Explanation

Aristocracy means اشرافیہ

Explanation

"Put away" means to save or store something, especially money, for future use.

The phrase fits the context of preparing financially for difficult times.

Explanation

3/8 of 40 = (3/8) × 40 = 120/8 = 15

Explanation

Given 2x - 6 = 0:

2x = 6

x = 6/2 = 3

Explanation

Antibodies are specialized proteins produced by the immune system.

They help identify and neutralize foreign substances like bacteria and viruses.

Explanation

Work done (W) is calculated as:

W = F * d * cos(θ)

where F is the force, d is the displacement, and θ is the angle between the force and displacement.

For work done to be zero, cos(θ) needs to be 0, which happens when:

θ = 90°