Explanation

Divisible by 2 → Yes

Divisible by 5 → Yes

Divisible by 10 → Yes

So 3200 is divisible by 2, 5, and 10.

Explanation

3/100 x = 60

3x=60×100

3X=6000

X = 6000÷3

X = 2000.

Explanation

To find 25% of 150, multiply 150 by 0.25:

150 × 0.25 = 37.5.

Therefore, 37.5 is 25% of 150.

Explanation

100 is 20% of 500. 

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%

Explanation

Step 1: Let's denote the two numbers as x and y.
We have two equations:

1. x + y = 28

2. x - y = 4

Step 2: Solve the system of equations.
Adding the two equations eliminates y:
(x + y) + (x - y) = 28 + 4
2x = 32
Step 3: Solve for x.
x = 32 / 2
x = 16
Step 4: Solve for y.
Substitute x into one of the original equations:
16 + y = 28
y = 28 - 16
y = 12
Step 5: Identify the correct pair of numbers.
The numbers are 16 and 12.

Explanation

Let's solve step by step using BODMAS rule:

2 × 2 + 2 ÷ 2

= 4 + 1

= 5

Explanation

Let two numbers be 4x and 5x

Their LCM = 180 and HCF = x

Now,

1st number × 2nd number = LCM × HCF

Or, 4x × 5x = 180 × x

Or, 20x = 180

Or, x = 9

Then, the smaller number = 4 × 9 = 36

Explanation

Thousand, Million, Billion, Trillion, Quadrillion, Quintillion-each comes with three additional zeroes.

Explanation

Given:

- Ratio of ages of A and B = 6 : 5  

- After 5 years, ratio = 9 : 8  

Let the ages be:

A = 6x  

B = 5x  

After 5 years:

(A + 5) / (B + 5) = 9 / 8

=> (6x + 5) / (5x + 5) = 9 / 8

Cross multiply:

8(6x + 5) = 9(5x + 5)  

48x + 40 = 45x + 45  

48x - 45x = 45 - 40  

3x = 5  

x = 5 / 3

Age difference = A - B = 6x - 5x = x = 5/3 years