Explanation

Earthquakes mostly occur along tectonic plate boundaries, where plates collide, slide, or separate.

Countries like Japan, Indonesia, and Chile lie on such zones, making them more earthquake-prone.

Explanation

The union (∪) of sets includes all unique elements from both sets.

From X = {3,4,5,6} and Y = {1,2,3,8}, their union is {1,2,3,4,5,6,8}.

Explanation

The subject of a sentence is the doer of the action.

In this sentence, "teacher" is the one who teaches, so it's the subject.

Subject: The teacher

Verb: teaches

Object/Complement: in the class

Explanation

The Indus River is the lifeline of Pakistan’s agriculture, supporting the largest irrigation system.

It irrigates vast lands in Punjab and Sindh, making it crucial for food production and economy.

Explanation

Irrational numbers cannot be expressed as fractions and have infinite non-repeating decimals.

Examples include √2, π, which do not terminate or repeat in decimal form.

Explanation

The prefix "dis-" means opposite of or not, and when added to "agreement", it becomes "disagreement".

"Disagreement" means a lack of agreement or conflict in opinion.

Explanation

The <embed> tag is used in HTML to insert audio, video, or other multimedia files.

It supports embedding external resources like media players, PDFs, or Flash.

Explanation

If U is the universal set and B = {2,4,6,8}, then U – B gives the complement of B.

So, U – B = {1,3,5,7}, which are elements in U not in B.

Explanation

6 people dig a 200m well in 15 days.

To find the total work done in terms of "man-days":

6 people × 15 days = 90 man-days

Now, let's find the number of people required to dig the same well in 18 days:

Let x be the number of people required.

x people × 18 days = 90 man-days

x = 90 / 18

x = 5

Explanation

The greatest 5-digit number is 99999.

Adding 2 gives 99999 + 2 = 100001, which is 1 more than the smallest 6-digit number (100000).