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7/8 x 4/21 = 1/6
Option B is the correct answer.
5 / (3 + √8) x ( (3  √8) / (3  √8)
= 5 ( 3  √8)/(3^{2  }8^{ )}
= 5 ( 3  √8 ) / 9  8 = 15  5√8
So option C is correct.
Remember the general formula to find rational number between two
given number 1/2(a+b)[where a, b are given numbers]
A rational number between 1 and 2 is 1/2(1+2)=3/2
The sum of the digits of a number is subtracted from the number, the resulting number is always divisible by:
Let the three digit number be 439
The sum of digits =16
Difference =439−16=423 which is divisible by 9.
7 / 8 x 4 / 21 = 1/6
So answer is option A .
The rational numbers include all the integers, plus all fractions, or terminating decimals and repeating decimals. Every rational number can be written as a fraction a/b, where aand b are integers. For example, 3 can be written as 3/1, 0.175 can be written as 7/40, and 1 1/6 can be written as 7/6. All natural numbers, whole numbers, and integers are rationals, but not all rational numbers are natural numbers, whole numbers, or integers.
Let x = 0.234234234.........
(1) Then , multiply both side with 1000 1000x = 234.234234......(2) Now Eq.(2)(1) 1000xx = 234.234234 0.234234 999x = 234 x = 234/999
There is no single number between 3 and 4, there is an infinite amount of numbers. If you are asking for INTEGERS, there are none. If not, you can have unlimited numbers between 3 and 4. For example, a number could be 3.0000000000000000005 or 3.9999999999999997.
X=0.230769
(1) 1000000=230769.230769
(2) subtracting
(1) from (2) 230769 =9999999x then, x =230769/9999999 =3/13
Real numbers are the numbers that can be placed on number line
And rational number can be placed on number line so all rational numbers are real number.
The product of two numbers is 20/9. If one of the numbers is 4, find the other.
 5 / 4 + x = 1
x = 1 + 5 / 4
x = (4 + 5) / 4
x = 1 / 4
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