Explanation

Let third number is x. Then first no.20%ofx=20x100 Second number=50%ofx=50x100 Percent of first no of second no,=20x10050x100×100=2×10020= 40%

Explanation

The phenomenon of Aurora Borealis, the display of red and green lights in the northern hemisphere is due to radiations from Ionosphere.

while

The aurora borealis of the Northern Hemisphere is often called the northern lights,

and the aurora australis of the Southern Hemisphere is known as the southern lights.

Explanation

 Heavy Mechanical Complex was established in 1979 with the aid of China in the district of Rawalpindi.

Explanation

Let side of the square = a

Area = a 2

 ∴ new side = 3a

Hence, new area = (3a)

2 =9a 2 Precentage increase in area = 

a 2 9a 2−a 2 ×100=800%

Explanation

Indian National Congress was founded on 28 December 1885.

Explanation

The original statement and its contrapositive are logically equivalent. Remember that the contrapositive is the “converse of the inverse"

Explanation

When we use ( pen) to write, we use ( ink) instead of (pen). Then we have to use the preposition ( in ) but not ( with).

eg. I write in ink.

When we use pencil, we have to use ( with) but not ( in).

eg. I wrote with a pencil.

Explanation

Let the total no. of students be

100 then 50%of 100= 50

30%of 50= 15

So, total no. of students having both=50+15=65

Explanation

Pull through is a phrasal verb which means شدید بیماری کے بعد صحتیاب ہونا (ایسی خطرناک بیماری جس سے موت کا خطرہ ہو)

Example: The operation has been successful and his wife will pull through soon.

Explanation

“Philos” means love  “Anthropos” means mankind or humanity.

A philanthropist is one who acts out of love for mankind.

while 

Misanthropist is a person who hates mankind and avoids human