Explanation

Cubic meter (Cubic meter is a unit of volume, not distance.)

Explanation

 1 + 2 + 3 + ... + n = 15  

This is an arithmetic series. Use the formula:

n(n + 1)/2 = 15  

→ Multiply both sides by 2:  

n(n + 1) = 30  

Try n = 5:  

5(6) = 30 

So, n = 5

Now calculate:  

1³ + 2³ + 3³ + ... + n³  

Use formula:  

[n(n + 1)/2]² = [5×6/2]² = (15)² = 225

Explanation

 Strayed – بھٹک جانا / راستے سے ہٹ جانا

Wandered – آوارہ گردی کرنا / ادھر اُدھر گھومنا

Explanation

 The ASCII 7-bit code is a character-encoding scheme that uses 7 bits to represent characters.

- The number of bits in ASCII 7-bit code is 7.

Explanation

The correct sentence would be: "The dog is faithful to his master."

The preposition "to" indicates loyalty or devotion to someone or something.

Explanation

i^25 = i^(24+1) = i^1 = i (since i^4 = 1)

(1/i)^32 = (i^-1)^32 = i^(-32) = i^0 = 1 (since i^4 = 1)

So, (i^25 - (1/i)^32)^2

= (i - 1)^2

= i^2 - 2i + 1

= -1 - 2i + 1

= -2i

Explanation

• When reporting direct speech, quotation marks are used.

• The question mark goes inside the quotes because it's part of the quoted question.

• A comma separates the reporting verb ("He said") from the direct quote.

Explanation

 To solve the differential equation dy/dx = cosx, we integrate both sides with respect to x.

∫dy = ∫cosx dx

y = sinx + C

where C is the constant of integration.

Explanation

Three types of bus are used.

Address bus: carries memory addresses from the processor to other components such as primary storage and input/output devices. 

Data bus : carries the data between the processor and other components.

Control bus: carries control signals from the processor to other components.

Explanation

Ferocious زبردست

Fierce درشت