MEDIUM
10th CBSE
IMPORTANT
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A two-digit number is such that the product of the digits is 15. If 18 is added to the number, the digits are interchanged. Find the number.

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Important Questions on Quadratic Equations

MEDIUM
10th CBSE
IMPORTANT
Modern's abc+ of Mathematics for Class 10>Chapter 4 - Quadratic Equations>EXERCISE>Q 23
Divide 16 two parts such that twice the square of the larger part exceeds the square of the smaller part by 164
MEDIUM
10th CBSE
IMPORTANT
Modern's abc+ of Mathematics for Class 10>Chapter 4 - Quadratic Equations>EXERCISE>Q 24
A two-digit number is such that product of its digits is 14. If 45 is added to the number, the digits interchange the places. Find the number.
MEDIUM
10th CBSE
IMPORTANT
Modern's abc+ of Mathematics for Class 10>Chapter 4 - Quadratic Equations>EXERCISE>Q 25
The denominator of a fraction is 3 more than its numerator. The sum of the fraction and its reciprocal is 2910. Find the fraction.
MEDIUM
10th CBSE
IMPORTANT
Modern's abc+ of Mathematics for Class 10>Chapter 4 - Quadratic Equations>EXERCISE>Q 26
The sum of first n even natural number is given by the relation S=n (n+1). Find n if the sum is 420.
MEDIUM
10th CBSE
IMPORTANT
Modern's abc+ of Mathematics for Class 10>Chapter 4 - Quadratic Equations>EXERCISE>Q 1
One year ago, a man was 8 times as old as his son. Now his age is equal to the square of his son's age find their present age.
MEDIUM
10th CBSE
IMPORTANT
Modern's abc+ of Mathematics for Class 10>Chapter 4 - Quadratic Equations>EXERCISE>Q 2
The sum of the age of a man his son is 45 years. Five years ago, the product of their ages was four times the man's age at that time. Find their present ages.
MEDIUM
10th CBSE
IMPORTANT
Modern's abc+ of Mathematics for Class 10>Chapter 4 - Quadratic Equations>EXERCISE>Q 3
A girl is twice as old her sister. Four years hence, the product of their ages (in years) will be 160. Find their present ages.
MEDIUM
10th CBSE
IMPORTANT
Modern's abc+ of Mathematics for Class 10>Chapter 4 - Quadratic Equations>EXERCISE>Q 4

The difference of a father's age and his son's age is 21 years and twelfth part of the product of their ages is less the father's age by 18 years. Find their ages.