Explanation

To solve the problem, follow these steps:

1: Determine B's efficiency compared to A:

• A can finish the work in 40 days, so A's work rate is  1/40 of the work per day.
  
• If B is 255% less efficient than A, it means B's efficiency is reduced by 255%, which implies B is not practically effective (usually considered inefficient or not working effectively in real terms).

2: Calculate B's efficiency:

• If B is 255% less efficient, B's effective efficiency would be negative, which isn't practically feasible. To make sense of this:
• Assume B’s efficiency is effectively lower compared to A in realistic scenarios.

3: Adjust B's effective efficiency for practical calculations:

• Let's use a model where B is significantly less efficient but not zero. For instance, if B’s efficiency is assumed to be around 10% of A’s for simplicity:
• B can do the work in approximately 400 days.

The closest feasible answer given practical scenarios and combined work rate calculations is None.

Explanation

Five experienced electricians Fahad, Hashim, Jamal, Kaleem and Masoor and four inexperienced electricians Rehman, Salman, Tahir and Waqar must decide which of them will be assigned to four work teams of exactly two electrician each. Assignments must meet the following restrictions:

• Each electrician is assigned to at most one team.
• At least one electrician on each team must be experienced.
• Neither Masoor nor Rehman nor Waqar can be assigned to a team with Fahad.
• If Tahir is assigned to a team, either Hashim or Kaleem must be assigned to that team.
• Jamal cannot be assigned to a team with Rehman.

Which one of the following is an who can be inexperienced electrician assigned to a team with Fahad?

A. Kaleem

B. Salman

C. Rehman

D. Tahir

Explanation

Smallpox induces long-term immunity after infection or vaccination.

It providing lifelong protection against future infections.

Explanation

Imitation: Individuality :: Jam : Traffic

Explanation

The Provincial Assembly of Punjab will have a total of 371 seats:

297 general seats,

66 reserved for women,

8 reserved for non-Muslims.

General Seats in National Assembly

Punjab: 141

Sindh: 61

Khyber Pakhtunkhwa: 45

Balochistan: 16

Islamabad: 3

Total general seats in NA: 266

Explanation

To find the number of shelves needed, divide the total number of books (24375) by the number of books that can be arranged in each shelf (375):

24375 ÷ 375 = 65

So, 65 shelves will be needed.

Explanation

The correct sentence is: She was preparing for the presentation.

This sentence is in the past continuous tense.

It indicating that the action of preparing was ongoing at a specific point in the past.

Explanation

The series is divided by 2 to get the next term, so:

240 ÷ 2 = 120

120 ÷ 2 = 40

40 ÷ 2 = 10

10 ÷ 2 = 2

And preceding the 240, we have:

440 ÷ 2 = 220

So, the correct sequence is: 220, 240, 120, 40, 10, 2.

Explanation

Doha is the capital and largest city of Qatar.

It has a significant seaport, the Port of Doha.

It serves as a major cargo and passenger hub for the country.

The port is strategically located on the Persian Gulf.

It facilitating trade and commerce between Qatar and other countries in the region and beyond.

Explanation

The idiomatic expression "to keep one's head" means to remain calm and composed, especially in a difficult or emergency situation.

It is often used to encourage someone to stay calm and think clearly, rather than panicking or losing control.