Question

the date of birth of boy is 4th october 1968. what will be his age on 1st january 1980

Answer 1

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First let's count his years of age = 1980- 1968= 12 years on 4 october 1980, which will be 12 months
January is 8 months lesser than October= 11 years 3 months
Days= As,October has 31 days, so 31-3= 29 days.
If he will be 3 months on 4 jan then he must have been 2 months in December and 4 jan has not come yet. 4 dec. to 4 jan= 31 days and it's 1 jan so, 31-3= 29 days

The age of the boy will be 11 years 2 months and 29 days

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Answer 2

Given:

Date of birth of a boy= 4th October 1968

To find:

The boy's age on 1 January 1980

Solution:

The boy's age on 1 January 1980 is 11 years, 2 months, and 28 days.

We can find the age by following the steps given below-

We know that the age increases by 1 every year and that the year is a leap year after every four years.

The boy's age on 4th October 1969 will be 1 year and it will keep on increasing by 1 each year after that.

So by 4th October 1979, the boy's age will be 11 years.

We know that there are 31 days in October.

So, the remaining number of days in October=31-4=27

The number of days in November 1979=30

The number of days in December 1979=31

The total number of days remaining till 1st January= Days remaining in October, November, and December

=27+30+31

=2 months and 27 days

So, the boy's age on 1 January 1980 is 11 years, 2 months, and 28 days.

Therefore, the boy's age on 1 January 1980 is 11 years, 2 months, and 28 days.