Ajay Kumar Solutions for Chapter: Numerical Ability, Exercise 8: Practice set

Murati has a total of Rs.$210 in one-rupee$, $50$ paisa and$25$paisa coins. They were in a ratio of$2.5 : 3 : 4$. How many one-rupee coins were there?

Two alloys containing copper and iron in the ratio$5 : 8$and$5 : 3$are melted in equal quantities. What is the ratio of iron and copper in resulting mixture?

The cost of petrol is $₹100$ per litre. After adulteration with diesel, which costs$₹50$ per litre, Sumit sells the mixture at $₹96$ per litre making a profit of $20\%$. In what ratio does he mix the two?

Abhijit, Binay and Chintu started a business with investments in the ratio $5 : 6 : 8$. After one year Chintu withdraws$50\%$ of his capital and Abhijit increased his capital by $60\%$of his investment. After two years in what ratio should the profit earned be distributed among Abhijit, Binay, and Chintu?

$20$ boys and $32$ girls form a group for social work. During their membership drive, the same number of boys and girls joined the group. How many members does the group have now, if the ratio of boys to girls is $3 : 4$respectively?

When $20\%$ of a number is added to another number the number increases by$50\%$, what is the ratio of the first number to the second?

The ages of Samar and Tanvi are in the ratio $8:15$ years. After $9$ years the ratio of their ages will be$11:18$. What is the difference in years between their ages?

If $\frac{a}{6}=\frac{b}{10}=\frac{c}{4}$, then $\frac{a+b+c}{c}=?$