Explanation

Total marks of 10 students = 10 × 80 = 800

Total marks of 15 students = 15 × 85 = 1275

Total marks of 5 new students = 1275 - 800 = 475

Last verified on 23-10-2026

Explanation

Given:

Increment in number = 20% of the number

Decrement in number = 20% of the new number

Concept used:

Net increase or decrease percent = {(Original number or Final number) - (Final number or original number) ÷ Original number} × 100

Calculation:

Let the original number be 100

When the number is increased by 20%

New Number = 100 + 20% of 100

⇒ 100 + 20

⇒ 120

Now, the number is decreased by 20%

Final number = New number – 20% of new number

⇒ 120 – 20% of 120

⇒ 120 – 24

⇒ 96

∴ Net Decrease in percentage = { (100 – 96) / 100} × 100

⇒ {4/100} × 100

⇒ 4%

∴ The net decrease percentage is 4%.

Last verified on 11-07-2026

Explanation

• Square Feet: 43,560 sq ft

Additional information:

• Square Yards: 4,840 sq yd
• Hectares: ~0.4047 hectares
• Square Meters: ~4,047 sq m

Last verified on 16-10-2026

Explanation

. Starts facing North, moves 7 km North.  

2. Turns West, moves 2 km.  

3. Turns South, moves 4 km → Now he's (7 - 4) = 3 km North from start.  

4. Turns West again, moves another 2 km → Total 4 km West.

So, from the starting point, he's 3 km North and 4 km West.

Use Pythagoras theorem to find the distance from the start:

Distance = √(3² + 4²) = √(9 + 16) = √25 = 5 km

Explanation

A completes the work in 12 days.

So, A's 1-day work:

1/12

B completes the work in 24 days.

So, B's 1-day work:

1/24

Together, their 1-day work:

1/12 + 1/24  

LCM of 12 and 24 = 24:

 2/24 + 1/24  

= 3/24  

= 1/8  

Therefore, they will complete the whole work in:

8 days

*

Last updated by NA on 09-09-2026​

Explanation

Explanation

Explanation

Series pattern is =6+9+12+15

6+6=12 is missing 

Explanation

• The sum of the three interior angles of a triangle is 180°.
• This rule applies to all types of triangles.
• If two angles are known, the third angle = 180° − (sum of the other two angles).
• It is a basic rule of geometry.
• This property is known as the Angle Sum Property.

Last updated 17 july 2026 by NA

Explanation

To find the average, we need to first convert each fraction to a decimal:

 5/6 = 0.83

 4/3 = 1.33

 3/4 = 0.75

Then, add the decimals and divide by the number of values:

 0.83 + 1.33 + 0.75 = 2.91

 2.91 ÷ 3 = 0.97

Now, convert the average back to a fraction:

 0.97 ≈ 35/36

Last verified on 01-07-2026