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 general knowledge math & puzzles

A father said to his son, "I was as old as you are at the present at the time of your birth". If the father's age is 38 years now, the son's age five years back was:

  1. 14

  2. 19

  3. 33

  4. 38
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Let the son's current age be x. At the son's birth (x years ago), the father's age was 38-x. The father says he was as old as the son is now, so 38-x = x. Solving gives x = 19. Five years ago, the son was 19-5 = 14 years old.

Multiple choice technology testing

‘X’ has given a data on a person age, which should be between 1 to 99. Using BVA which is the appropriate one

  1. 0,1,2,99

  2. 1, 99, 100, 98

  3. 0, 1, 99, 100

  4. –1, 0, 1, 99
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Boundary Value Analysis evaluates boundaries and values just outside them. For a valid range of 1 to 99, the boundary points are the lower limit (1) and upper limit (99). The immediate invalid values are 0 (below 1) and 100 (above 99), yielding the correct set of 0, 1, 99, and 100.

Multiple choice

Hari (H), Gita (G), Irfan (I) and Saira (S) are sibiligs (i.e. brothers and sisters). All were born on 1st January. The age difference between any two successive siblings (that is born one after another) is less than3 years. Given the following facts: i. Hair's age + Gita's age > Irfan's age + Saira's age. ii. The age difference between Gita and Saira is 1 year. However, Gita is not the oldest and Saira is not the youngest. iii. There are not twins.

In what order were they born (0ldest first)?

  1. HSIG

  2. SGHI

  3. IGSH

  4. IHSG
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Multiple choice

Billy has a mental age of 8 and a chronological age of 10. Billy's IQ is

  1. 108

  2. 125

  3. 80

  4. 92
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

IQ is calculated using the formula: IQ = (mental age ÷ chronological age) × 100. For Billy: (8 ÷ 10) × 100 = 80. An IQ of 100 is average; below 100 indicates below-average intelligence relative to age peers. This is the original formula developed by Binet and Simon.

Multiple choice

The average twelve-year-old child has a mental age equal to

  1. 100

  2. 120

  3. 10

  4. 12
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mental age represents the age level at which a person performs intellectually. By definition, the average child's mental age equals their chronological age. An average 12-year-old has mental age 12, just as an average 10-year-old has mental age 10.

Multiple choice

Two persons in twenty-five, aged forty years or more, are now working from home, compared with just one in ninety in 1990.

  1. persons in twenty-five, aged forty years or more, are now working from home, compared with just one in ninety

  2. in twenty-five persons, whose age is forty or more, is now working from home, compared to just one of ninety

  3. persons in twenty-five, aged forty or older, is now working from home, compared to just one in ninety

  4. among twenty-five persons, aged forty or more, is now working from home, compared with just one in ninety

  5. persons in twenty-five, of age forty or older, are now working at home, compared to just one person in ninety
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Correct. The sentence contains no error.

Multiple choice

Priya's current age is four more than three times the current age of her nephew Praveen, who is 12 years old. Which expression represents Priya's current age (in years)?

  1. 4 * (12 + 3)

  2. 4 + (3 * 12)

  3. 3 + (4 * 12)

  4. 3 * (12 + 4)

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

Praveen's current age is 12 years.  Three times the current age of Praveen = (3 * 12) years  It is given that Priya's current age is four more than three times the current age of Praveen. Thus, Priya's current age (in years) is 4 + (3 * 12). The correct answer is option (2).

Multiple choice

The age of the Earth has been estimated to be about

  1. 3.75 billion years

  2. 4.25 billion years

  3. 4.54 billion years

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

The age of Earth is estimated to be approximately 4.54 billion years (with an error margin of about 1%), based on radiometric dating of meteorites and Earth's oldest rocks. This method measures the decay of radioactive isotopes like uranium-238 into lead-206. The oldest terrestrial minerals (zircons) are about 4.4 billion years old, consistent with this age.

Multiple choice

Ramesh and Rakesh have the same mental age 8 - 0. We can conclude that

  1. they have the same potential for success in school.

  2. they have the same IQ

  3. their interests are similar

  4. their ability to learn may be quite different

  5. they copied from each other on the test
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

As every child is unique and different, hence even after same mental age their ability to learn may be quite different.

Multiple choice

Tom notices that his age is divisible by 14 and his friend notices that it is divisible by 3. what could be the smallest possible age of Tom?

  1. 42 years

  2. 52 years

  3. 84 years

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

Tom's age must be divisible by both 14 and 3, meaning we need the least common multiple (LCM) of 14 and 3. The LCM of 14 and 3 is 42, making 42 years the smallest age that satisfies both conditions. 52 is not divisible by 14, and 84, while divisible by both, is not the smallest.