Explanation

3×2=6

6+4=10

10×2=20

20+4=24

24×2=48

48+4=52

Answer is 52 if you are asking the first number that will be before 48.

If you are just asking the first number here then it will be 48.

Explanation

Let r be the radii of a circle.

Then, area of circle =πr 2 

If radii are doubled, than radii become 2r.

Now, area of circle =π(2r) 2

 =4π. Therefore, the area of circle is increased by 4 times.

Explanation

Cost of 2 pencils = $1, so the price of 1 pencil = $1 ÷ 2 = $0.50.

Cost of 5 pencils = 5 × $0.50 = $2.50.

Explanation

Cost of 25 toys=₹500

Cost of 1 toy =500/25=₹20

now,

the cost of 75 toys=75 x20=₹1500

Explanation

A perfect square is a number, from a given number system, that can be expressed as the square of a number from the same number system.

Explanation

Let's say that B makes $100.

 

Then A makes $75.

 

So, your question then becomes 100 is what percent of 75?

 

   This can be solved by setting up the proportion 100 / 75 = x / 100

 

                                                                             75x = 10000

 

                                                                                x = 133.3

 

So, B's income is 33.3% more than A's income. 

Explanation

Let total income be = x
 after spending 20% of x he has = 10080​x

after spending 70% of remaining he has
=10030​×10080​x
10030​×10080​x=1800
x=241800×100​=300×25=7500

Explanation

Let Arif’s shear= x

Hafiz’s shear = 4x

Arif’s shear is 1/3 of Haider, it means

Haider shear = 3x

Given condition:

x + 4x + 3x= 2560

              8x = 2560                x = 320 

So arif’s shear = 320

Explanation

A linear Scale is a line which is divided into equal parts.

Explanation