Cognizant Aptitude Screening 2

Question 1

A train 180 m long passes a pole in 9 seconds. How long will it take to pass a platform 270 m long?

Accepted Answer

22.5 seconds

Answer

Speed = 180/9 = 20 m/s; total distance = 180+270 = 450 m; time = 450/20 = 22.5 seconds.

Question 2

If A can do a piece of work in 12 days and B can do it in 18 days, how many days will they take working together?

Accepted Answer

7.2 days

Answer

Combined rate = 1/12 + 1/18 = 5/36; days = 36/5 = 7.2 days.

Question 3

What is the next number in the series: 3, 9, 27, 81, ___?

Accepted Answer

243

Answer

Each term is multiplied by 3; 81 × 3 = 243.

Question 4

A shopkeeper marks goods 40% above cost price and gives a 20% discount. What is his profit percent?

Accepted Answer

12%

Answer

SP = CP × 1.4 × 0.8 = 1.12 CP, giving 12% profit.

Question 5

If the simple interest on a sum for 4 years at 5% per annum is ₹2000, what is the principal?

Accepted Answer

₹10000

Answer

SI = P×R×T/100 → 2000 = P×5×4/100 → P = 10000.

(Cognizant) Cognizant Test Practice Test