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A twodigit number is such that the product of the digits is 8. When 18 is added to the number, then the digits are reversed. The number is:
ANSWER : b
Solution : Let the two numbers be x and y respectively.
According to the question :
xy = 8 _______(i)
10x + y + 18 = 10y + x
=> 10x  x + 18 = 10y  y
=> 9(x + 2) = 9y
=> x + 2 = y ______(ii)
Putting the value y in equation (i) we get,
x(x + 2) = 8
=> x² + 2x  8 = 0
=> x² + 4x  2x  8 = 0
=> x(x + 4)  2(x + 4) = 0
=> (x  2) (x + 4) = 0
=> x = 2 or  4
Putting the positive value of x in equation (ii),
2 + 2 = y = 4
Hence, The number is : 2 × 10 + 4 = 20 + 4 = 24
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Write the fraction representing the shaded region in the below figure.
What is the fractional form of five eighteenths?
The fractional form of five eighteenths
= 5/18
Write the fraction representing the shaded portion.
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Like Fractions: The fractions having the same denominators are known as like fractions. We know that fractions such as 2/5, 3/5, 5/5, 7/5, 9/5, …. etc., are like fractions.
Give a proper fraction whose denominator is 7 and numerator is
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Write the natural numbers from 102 to 113. What fraction of them are prime numbers?
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Hence fraction of prime numbers = 4/12 = 1/3
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Write the fraction representing the shaded region in the below figure
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