finding a week on basis of another week Detailed Explanation And More Example

Answer: (b)

15 August 1947 means,

1946 complete years + first 7 months up to July 1947 + 15 days of August 1947

1600 years have 0 odd days.

300 years have 1 odd day

46 years have 11 leap years and

35 ordinary years = (11 × 2) + (35 × 1)

= 22 + 35 = 57 odd days

= 8 × 7 + 1 odd days = 8 weeks + 1 odd day

Up to 1946 there are 1 + 1 = 2 odd days

January 1947 = 3 odd days

February 1947 = 0 odd days (1947 is a normal year)

March 1947 = 3 odd days

April 1947 = 2 odd days

May 1947 = 3 odd days

June 1947 = 2 odd days

July 1947 = 3 odd days

Up to 15 August = 15 odd days

Total number od odd days up to 15 August 1947

= 2 + 3 + 0 + 3 + 2 + 3 + 2 + 3 + 15

= 33 odd days.

Hence, 15th August 1947 was Friday.

Answer: (c)

2 days before yesterday = Friday

∴ Yesterday = Friday + 2 = Sunday

∴ Today = Sunday + 1 = Monday

∴  Day after tomorrow = Monday + 2 = Wednesday

Answer: (a)

A day after tomorrow = Tuesday

∴ Two days after the day after tomorrow = Tuesday + 2

= Thursday

Answer: (b)

Day 9 days ago = Thursday

Therefore, Today = Thursday + 9

= Thursday + 7 + 2

= Thursday + 2 = Saturday

Answer: (b)

The correct day on which Anil has to reach the place = Friday + 3 = Monday.

Therefore, if Anil reaches on Sunday, then he reaches there on the day which is (Monday - 1) or 1 day before the correct day.

Answer: (c)

A day before yesterday = Thursday

Yesterday = Thursday + 1 = Friday

Today = Friday + 1 = Saturday

Therefore, Sunday = Saturday + 1 = Tomorrow