R. Gupta Solutions for Exercise 3: Arithmetical & Numerical Ability

A circle has a circumference equal to the perimeter of a square. The ratio of the radius of the circle to the side of the square is:

A sum of money at simple interest amounts to Rs. $815$ in $3$ years and to Rs. $854$ in $4$ years. The sum is:

The average age of Magan and Chhagan after a period of $5$ years from now will be $20$ years. Magan's present age is $12$ years. What is their average age now?

If an amount of Rs. $150000$ is shared between A, B, and C in the ratio of $2:3:5$, then A receives the same amount as he would receive if another sum of money is shared between A, B, and C in the ratio of $5:3:2$. The ratio of Rs. $150000$ to the second amount of money:

A one-metre border, inside a rectangular field of length and breadth, are $8$ m and $5$ m respectively, has to be ploughed. If the cost of ploughing is Rs. $20$ per square metre, then how much amount will be spent in ploughing the entire border?

Two numbers are such that the sum of thrice the first number and twice the second number is $200$ and twice the first number minus thrice the second number is $25$. The numbers are:

The wages of a worker are increased by $20\%$. The increased wages are reduced by $20\%$. Express the net change in wages as a percentage of the original wages?

Ketan is $4$ times as fast as Mayur in completing any work. Mayur takes $15$ days more than Ketan to finish the same work. If both work together, then in how many days will the work be completed?