Question: The 19th of September 1987 was Saturday. What day was the 20th of September 1990 if 1988 was a leap- year?

1. Monday
2. Tuesday
3. Wednesday
4. Thursday
5. Friday

Answer:

Approach Solution (1):

There are 365 days in an ordinary year and 366 days in a leap- year.

365 divided by 7 (a week period) yields a remainder of 1, thus the same date after an ordinary year would fall on the next day of a week;

366 divided by 7 (a week period) yields a remainder of 2, thus the same date after a leap- year would fall two days after in a week;

Thus 3 years, 1988, 1989 and 1990, will accumulate 2 + 1 + 1 = 4 days, plus 1- day difference between 19th and 20th, which gives total of 5- day difference (5- day shift). Thus, 20th of September 1990 was Saturday + 5 days = Thursday

Correct option: D

Approach Solution (2):

In a leap year, the Gregorian calendar adds an extra day to the shortest month of the year- February. So instead of February having 28 days as in an ordinary year, in a leap year, February has 29 days.

Thus if 19th of September 1987 was a Saturday 1988 would be a Monday as you add an extra day in February 1988. Using the same logic/ pattern, 19th of September 1989 would be a Tuesday, 19th of September 1990 would be a Wednesday and the 20th of September 1990 would be a Thursday.

Correct option: D

“The 19th of September 1987 was Saturday. What day was the 20th of September 1990 if 1988 was a leap- year?”- is a topic of the GMAT Quantitative reasoning section of GMAT. This question has been taken from the book “GMAT Official Guide Quantitative Review”. To solve GMAT Problem Solving questions a student must have knowledge about a good amount of qualitative skills. The GMAT Quant topic in the problem-solving part requires calculative mathematical problems that should be solved with proper mathematical knowledge.

Suggested GMAT Quant Questions:

• A Survey was Conducted Among 1000 People to Know About their Eating Habits GMAT Problem Solving
• Jake Rides His Bike for the First 2/3 of the Distance From Home to School GMAT Problem Solvingl
• Two Trains Running in Opposite Directions Cross a Man Standing on the Platform GMAT Problem Solving
• Initial Population of a Town was 8000 People GMAT Problem Solving
• The Volume of a Sphere with Radius r is (4/3)*pi*r^3. A Solid Sphere GMAT Problem Solving
• Which of the Following is Equal to 5^17×4^9? GMAT Problem Solving
• In a Shooting Competition, Probability of A Hitting Target is 2/5, by B is 2/3 and C is 3/5 GMAT Problem Solving
• The Sides of a Quadrilateral Taken in Order are 16,16,14 and 10GMAT Problem Solving
• If 80 Lamps Can Be Lighted, 5 Hours Per Day For 10 Days GMAT Problem Solving
• If <d> denotes the area of a circle with diameter d, then which of the following is equal to <4>*<6> GMAT Problem Solving
• At exactly what time past 7:00 will the minute and hour hands of an accurate working clock be precisely perpendicular to each other for the first time? GMAT Problem Solving
• There is a 120 Liter Mixture of Alcohol and Water GMAT Problem Solving
• When X Is Divided By 13, The Answer Is Y With a Remainder of 3 GMAT Problem Solving
• If a/b = 2/3 Which of the Following is Not True? GMAT Problem Solving
• 1/3 of the Cookies in a Jar are Chocolate Chip, 2/3 of the Remaining Cookies are Peanut Butter GMAT Problem Solving
• The Kinetic Energy K, in Joules, Provided by the Mass of a Particle m GMAT Problem Solving
• A Recent Survey Showed That 50 Percent of People Polled Believe that Elected Officials Should Resign GMAT Problem Solving
• The Perimeter of a Square is Equal to the Perimeter of a Rectangle Whose Length And Width are 6m and 4m Respectively GMAT Problem Solving
• The Closing Price of Stock X Changed on Each Trading Day Last Month GMAT Problem Solving
• An Exam Consists of 8 True/False Questions GMAT Problem Solving
• From her Collection of 9 Different Hats Ellen Wants to Wear one Different Hat GMAT Problem Solving
• Company C Sells a Line of 25 Products with an Average Retail Price of $1,200 GMAT Problem Solving
• A Man has 1044 Candles. After Burning, He can Make a New Candle GMAT Problem Solving
• An Equilateral Triangle ABC is Inscribed in Square ADEF GMAT Problem Solving
• A Popular Website Requires Users to Create a Password Consisting of Digits Only GMAT Problem Solving
• A Furniture Store Sells Only Two Models of Desks, Model A and Model B GMAT Problem Solving
• In a Drawer, There are 4 White Socks, 3 Blue Socks, and 5 Grey Socks GMAT Problem Solving
• There are 100 Apples in a Bag of which 98% are Green and Rest are Red GMAT Problem Solving
• A palindrome is a number that reads the same forward and backward GMAT Problem Solving
• Three Cars Leave From A To B In Equal Time Intervals GMAT Problem Solving
• An Inlet Pipe can Fill in an Empty Cistern in 30 minutes GMAT Problem Solving
• Iqbal Dealt Some Cards to Mushtaq and himself from a Full Pack of Playing Cards GMAT Problem Solving
• A Zookeeper Counted the Heads of the Animals in a Zoo and Found it to be 80 GMAT Problem Solving
• A Shop Stores x kg of Rice. The First Customer Buys half this Amount Plus half a kg of Rice GMAT Problem Solving
• In a Class of 120 Students Numbered 1 to 120, All Even Numbered Students Opt for Physics GMAT Problem Solving
• Machine A Produces bolts at a Uniform Rate of 120 Every 40 seconds GMAT Problem Solving
• If The Average (arithmetic mean) of The Four Numbers 3, 15, 32, and (N + 1) is 18, then N = GMAT Problem Solving
• Out of 7 Consonants and 4 Vowels, How Many Words of 3 Consonants and 2 Vowels Can be Formed? GMAT Problem Solving
• 4 Bells Toll Together at 9:00 A.M. They Toll After 7, 8, 11 and 12 Seconds GMAT Problem Solving
• 12 Marbles are Selected at Random from a Large Collection of White, Red, Green and Yellow Marbles GMAT Problem Solving
• Find the greatest number that will divide 43, 91 and 183 GMAT Problem Solving
• Of the 150 Houses in a Certain Development GMAT Problem Solving
• A man can hit a target once in 4 shots. If he fires 4 shots in succession GMAT Problem Solving
• If 75 Percent of a Class Answered the First Question on a Certain Test Correctly GMAT Problem Solving
• A Clock Strikes 4 taking 9 seconds GMAT Problem Solving
• What is the Largest Power of 3 Contained in 200! GMAT Problem Solving
• Find The Value Of x GMAT Problem Solving
• 4 Out Of 15 Apples Are Rotten. They Are Taken Out One By One At Random GMAT Problem Solving
• Last Year 26 Members of a Certain Club Traveled to England, 26 Members Traveled to France, and 32 Members Traveled to Italy GMAT Problem Solving
• Running at the Same Constant Rate, 6 Identical Machines can Produce a Total of 270 Bottles Per Minute GMAT Problem Solving