Civil Services Prep

Prelims 2026 · CSAT / Quantitative Aptitude · Question 43

A person saves 10% of his salary every month. If his salary increases by 12% and the expenditure increases by 10%, then what will be the change in his saving per month?<br/>

  1. 20% increase
  2. 30% increase
  3. 03% decrease
  4. 02% decrease

Answer

30% increase

Let salary be 100. Then saving = 10 and expenditure = 90. New salary = 112. New expenditure = 90 × 1.10 = 99. So new saving = 112 − 99 = 13. Saving rises from 10 to 13, which is an increase of 3 on 10, i.e. 30%.

  1. X receives three coins of different denominations : 1, 2, 5, 10 and 20. If the total amount received by X is…
  2. For two distinct real numbers x and y, which of them is bigger? Statement I : x^2 Statement II : y
  3. If x and y are integers, then is x even? Statement I : x^2 y^2 is even. Statement II : 1 + x^2 + y^2 is odd.
  4. X is a collection of certain odd numbers whereas Y is a collection of certain even numbers. T consists of the…
  5. If x, y and z are integers, each greater than 1, then is x a prime number? Statement I : xy^2 = 116 Statement…
  6. Which of the following conclusions are valid? 1. Seven Sanskriti Angans, representing different regions of…