Question

When asked her age, Ms Marple says 'I will be n years old in the year n^2.' How old was she in

2000?
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Answer 1

Answer:

Ms. Maple was 20 years old in 2000.

CALCULATION OF n

Ms. Maple will be n year old in the year n².

As such we need to find a year in near future which is a perfect square.

It is observed that the nearest perfect square to the current year is 2025.

So n² = 2025 = 45²

or n² = 45²

or n = 45

So, Ms. Maple will be 45 year old in 2025.

HER AGE IN 2000

2000 is 25 years in the past from 2025

So, her age in 2000

= Age in 2025 - 25

= 45 - 25

= 20

Ms. Maple was 20 years old in 2000