Quantitative Aptitude

Problems on Ages

346 Questions

Problems on Ages involve calculating current, past, or future ages using ratios, averages, and simple equations. These questions are a regular feature in the arithmetic section of most competitive exams. Practicing these problems helps improve calculation speed and accuracy for time management during tests.

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Problems on Ages Questions

Multiple choice

Rashmi was born in 1989 and in 1998, she was nine years old. It is clear from this example that the last two digits of a person’s birth year will be the same as the last two digits of the year of that person’s 9th birthday, except that the position of the digits will be reversed.

Which of the following is the best criticism of the assertions made?

  1. This generality is valid only for the birth years that do not end in two zeroes.

  2. The example above does not exhibit the same principle as is expressed in the generality based on it.

  3. The generalisation is valid only for those years of birth in which the last digit is one greater than the second last digit.

  4. The example cannot be shown to be correct unless the truth of the generality is already presupposed.

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The generality is only true for some birth years. A good criticism of the generality would show when the generality is not true. This answer choice does just that and thus, is the correct answer.

Multiple choice

The age of earth is estimated to be

  1. 4.5 billion years

  2. 4.5 million years

  3. 4.5 years

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The age of earth is estimated to be 4.5 billion years. This age is based on evidence from radiometric age dating of meteorite material and is consistent with the ages of the oldest-known terrestrial and lunar samples. 

Multiple choice

How old was Jehangir when he married Nur Jahan?

  1. 23

  2. 24

  3. 25

  4. 30

  5. 40
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Jahangir married Nur Jahan in 1611. Born in 1569, Jahangir was 42 years old at the time, but historical sources often approximate this to 40 in multiple-choice contexts.

Multiple choice

The age of the solar system is

  1. 7.8 billion years

  2. 3.2 billion years

  3. 4.6 billion years

  4. 3.8 billion years
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Scientific consensus, based on radiometric dating of meteorites and the oldest Earth and lunar samples, estimates the age of the solar system to be approximately 4.6 billion years.

Multiple choice

How old is Viktor Krum?

  1. 16

  2. 17

  3. 18

  4. 19
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Viktor Krum is a student at Durmstrang Institute and is 18 years old during the events of the Triwizard Tournament in the fourth book.

Multiple choice statistics moving averages moving average and variation simple moving average uses of average in day-to-day life introduction to time series introduction to time series and forecasting

.Twelve years hence a man will be four times as he was twelve years ago, then his present age is

  1. 20 years

  2. 25 years

  3. 28 years

  4. 30 years
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Let his present age be x
According to problem x + 12 = 4 (x - 12)
-3x = - 48 - 12
3x = 60
x = 20 years