1000+ General Aptitude Questions and Answers Pdf - 1

Ans: B

Quantity of pure alcohol in 400 ml sold = $${15}/{100} × 400$$ = 60 ml

∴ Quantity of water in the alcohol = 340 ml

In the new solution, 68% = 340 ml

100% = 500 ml

∴ Quantity of alcohol to be added to make concentration of 32%

= 500 - 400 = 100 ml

Ans: B

40% of ? = 240

⇒ $${40 × ?} /{ 100}$$ = 240

⇒ ? = $${240 × 100} /{ 40}$$ = 600

Ans: D

Monthly income of the person = Rs.13500

Monthly expenditure of the person = Rs.9000

Savings of the person = Rs.4500

Next year his monthly income = $${114}/{100} × 13500$$ = 15,390

His monthly expenditure = $${107}/{100} × 9000$$ = Rs.9630.

His savings = 114 × 135 - 107 × 90

= 45 (342 - 214)

= 45 × 128

∴ Percentage increase in savings

= $${45 × 128 - 45 × 100} / {45 × 100}$$ = $${45 × 28} / {45 × 100}$$ = 28%.

Ans: D

Let the total number of candidates be 100

Number of candidates passed in English = 70

∴ Failed candidates in English = 30

∴ Number of failed candidates in English alone = 30 - 10 = 20

Number of candidates passed in Maths = 80

Number of candidates failed in maths = 20

Number of candidates failed in Maths alone = 20 - 10 = 10

Number of candidates failed in both = 10

∴ Total number of failures = 20 + 10 + 10 = 40

∴ Total number of candidates passed = 100 – 40 = 60

∴ Strength of candidates attended the examination for a pass of 144 candidates.

Ans: B

Reduced price = $${20% of 100} /{4}$$ = 5 per kg.