KVS MATHS QUIZ 61

The average score of 84 students (boys and girls) in a test is 95 . The ratio of the number of boys to that of girls is $10: 11$. The average score of the boys is $20 \%$ less than that of the girls. What is the average score of the boys in the test?

A shopkeeper gives $18 \%$ discount on the discounted price after giving an initial discount of $12 \%$ on the marked price of the washing machine. If the final sale price is ₹ 19,844, then marked price (in ₹) is:

The ratio of the present ages of A and B is 8 : 15. After four years from now, their ages will be in the ratio 9 : 16. What will be the sum of their ages (in years) after 8 years from now?

The present age of a father is equal to sum of the ages of his 4 children. After ten years ,the sum of the ages of the children will be $1.6$ times the age of their father. What is the present age of father?

$A, B$ and $C$ together can complete a work in $x, 30$ and 45 days, respectively. B and C worked together for 6 days. The remaining work was completed by $A$ alone in 12 days. The value of $x$ is:

The value of $3 \frac{1}{9} \div \frac{4}{9}$ of $\left(7 \frac{3}{10}+3 \frac{1}{5}\right)+\frac{4}{5} \div 2 \frac{2}{5}$ is:

The height of A is 20% more than that of B, and the height of B is 20% less than that of C. The height of C is 30% more than that of D. If the difference between the heights of C and A is 6.8 cm, then what is the height (in cm) of B?

A sum of Rs. 3, 780 is divided between A, B, and C such that if their shares are decreased by Rs. 130, Rs. 150 and Rs. 200, respectively, then they are in the ratio of 5: 2 : 4. What is the original share of C?

If the annual rate of simple interest increases from $8 \%$ to $12 \frac{1}{2} \%$, a person's yearly income increased by ₹ $639 .$ The principal amount (in ₹) is: