Quantitative aptitude

Question A man swims 12 km downstream and 10 km upstream. If he takes 2 hours each time, what is the speed of the stream? Type multiple_choice Option 1 km/hr incorrect Option 0.5 km/hr correct Option 1.5 km/hr incorrect Option 0.7 km/hr incorrect Solution Speed downstream =  Distance/time = 12/2 = 6 km/hr Speed downstream […]

Question A man rows downstream at 20 km/hr and rows upstream at 15 km/hr. At what speed he can row in still water? Type multiple_choice Option 17.5 km/hr correct Option 18 km/hr incorrect Option 20.5 km/hr incorrect Option 22 km/hr incorrect Solution Apply formula: Speed in still water 1/2 (speed downstream + speed upstream) Speed

Question If it was Wednesday on March 1, 2006, which day was it on March 1, 2002? Type multiple_choice Option Tuesday incorrect Option Friday correct Option Monday incorrect Option Sunday incorrect Solution Total number of odd days between the years 2002 and 2006 = (2006 – 2002) + 1 = 5 odd days. The year

Question It was Saturday on January 1, 2005. Find the day of the week on January 1, 2010. Type multiple_choice Option Tuesday incorrect Option Friday correct Option Wednesday incorrect Option Sunday incorrect Solution On December 31, 2004, it was Friday. Number of odd days from the year 2005 to the year 2009 = 1+1+1+2(leap year)

Question The day on 5th April of a year will be the same day on 5th of which month of the same year? Type multiple_choice Option 5th July correct Option 5th August incorrect Option 5th June incorrect Option 5th October incorrect Solution April & July for all years have the same calendar. So, a day on any date of April will

Question How many days are there in y weeks y days? Type multiple_choice Option 8y correct Option 8y2 incorrect Option 16y incorrect Option 21y incorrect Solution There are 7 days in a week, so y weeks will contain 7y days. ∴The required number of days = 7y + y days = 8y days

Question Which of the following years is not a leap year? Type multiple_choice Option 800 incorrect Option 700 correct Option 1600 incorrect Option 2000 incorrect Solution A century divisible by 400 is a leap year. The years 800, 1600 and 2000 are divisible by 400, so they are leap years. The year 700 is not

Question What was the day of the week on June 17, 1991? Type multiple_choice Option Tuesday incorrect Option Wednesday incorrect Option Friday incorrect Option Monday correct Solution June 17, 1991 = (1990 years + period from 01.01.1991 to 17.06.91) ⇒Odd days in 1600 years = 0 ⇒Odd days in the next 300 years = 15

Question Today is Wednesday, after 68 days, it will be Type multiple_choice Option Friday incorrect Option Sunday incorrect Option Monday correct Option Thursday incorrect Solution Each day of a week is repeated after 7 days, so after 70 days, it will be Wednesday. Therefore, after 68 days, it will be Monday.

Question On February 5, 1998, it was Thursday. The day of the week on February 5, 1997, was Type multiple_choice Option Wednesday correct Option Monday incorrect Option Friday incorrect Option Sunday incorrect Solution 1997 was an ordinary year, it had 1 odd day. So, the day on February 5, 1998, would be one day beyond