Explanation

To convert 810/500 so you can write it as a decimal,

simply divide the numerator by the denominator, like this:

= 810/500

= 810 ÷ 500

= 1.62

Explanation

Explanation

Let: B= x   and A= 2x

(A+B) 18 days work = 1 

(A + B) one day work= 1/18

So:

x + 2x =1/18

⇒     x =  1/54 

So A=27 and B= 54

Explanation

Given: x = 3  

x³ = 3 × 3 × 3 = 27

Explanation

5 percent *5

= (5/100)*5

= (5*5)/100

= 25/100 = 0.25

Explanation

The sum of odd integers from 1 to 100 are - 1 + 3 + 5 + 7 + ……… + 99.

This is an Arithmetic Progression with the following parameters: First Number, a = 1 Last Number, l = 99 Common Difference, d = 2 So, the Number of terms in the Arithmetic Progression, n = (l - a)/d + 1 = (99 - 1)/2 + 1 = 98/2 + 1 = 49 + 1 = 50 So, the sum of the Arithmetic Progression, S = n/2(l + a) = 50/2(99 + 1) = 25 X 100 = 2500 So, the sum of odd integers from 1 to 100 = 2500

Explanation

The rate at which Masons build walls is what we need to understand with this problem.

15*X = 20

15*X/20 = 1 Wall

Therefore, a fifteenth of a wall can be built by one mason in 20 days.

Each day, a mason can build 1/(15*20) or 1/300th of an entire wall.

Therefore, it would take one mason 300 days to build a wall on their own.

It would take 15 masons 20 days (300/20) to build a wall.

And we can estimate the 12 day solution with the following formula:

300/12 = 25

It would take 25 masons 12 days .

Explanation

Find the prime factorization of 70

70 = 2 × 5 × 7

Find the prime factorization of 80

80 = 2 × 2 × 2 × 2 × 5

Multiply each factor the greater number of times it occurs in steps i) or ii) above to find the LCM:

LCM = 2 × 2 × 2 × 2 × 5 × 7

LCM = 560

Explanation

Explanation