Explanation

Current total marks = Average * Number of tests

= 60 * 4

= 240

New average = 65

New total tests = 5

New total marks = New average * New total tests

= 65 * 5

= 325

Marks needed in the fifth test = New total marks - Current total marks

= 325 - 240

= 85

Explanation

Now, let's examine the differences between consecutive terms:

17 − 6 = 11

39 − 17 = 22

72 − 39 = 33

The pattern of differences: +11, +22, +33 → increasing by 11 each time.

Next difference should be: +44

So,

72 + 44 = 116

Explanation: Differences follow a pattern: +11, +22, +33, +44.

Explanation

When using future perfect tense ("will have passed"), the clause with "when" takes present simple tense — not future.

So, the correct sentence is: "Three hours will have passed when the bell rings."

Explanation

The eye lens focuses light to form a real and inverted image on the retina.

The brain then processes this image and interprets it as upright.

Explanation

Explanation

The phrase "needn't have gone" indicates that the action was unnecessary but was done anyway.

This is the correct use of "needn't have" in a past context to express regret or realization.

Explanation

Persome ordered Mary not to answer her back like that.

The direct command "Don’t answer" changes to "not to answer" in indirect speech.

The reporting verb "said" becomes "ordered" to reflect the commanding tone.

Explanation

Pakistan’s Constituent Assembly was officially constituted on July 20, 1947, under the Indian Independence Act 1947. This assembly served dual roles:

Legislative: Acting as Pakistan’s first parliament.

Constitutional: Drafting the country’s first constitution.

First Session: Held on August 10–14, 1947, in Karachi.

President: Jogendra Nath Mandal (temporary chair) and later Muhammad Ali Jinnah as permanent President.

Explanation

Plasma is the liquid part of blood that transports nutrients, hormones, and waste materials.

It carries digested food materials to all parts of the body for use or storage.

Explanation

First and Third Numbers:

9² = 81

8² = 64

So for 10: 10² = 100 → third number is 100

Now the middle number:

9 × 5 = 45

8 × 4.5 = 36

Seems like:

Middle number = First number × 5 (for 9), and × 4.5 (for 8)

Let’s check the pattern:

9 → ×5 = 45

8 → ×4.5 = 36

So 10 → ×4 = 40

Final Set:

10 (40) (100)