Age Calculations

111,111,111 is divisible by ,

The average of $10$ numbers is $40.2$. Later it is found that two numbers have been wrongly added. The first is $18$ greater than the actual number and second number added is $13$ by mistake instead of $31$. Find the correct average.

The average temperature of the first three days is $22°\mathrm{C}$ and of the next three days is $24°\mathrm{C}$. If the average temperature of the whole week is $23.5°\mathrm{C}$, what is the temperature of the last day of that week?

Three numbers which are co-prime to one another are such that the product of the first two is $551$ and that of the last two is $1073$. The sum of the three number is _____.

The sum of the present ages of father and son is $80$$years$. $4$$years$ ago, the ratio of their age was $2:1$. Father's present age will be?

$B$ is twice as old as $A$ but twice younger than $F$. $C$ is half the age of $A$ but is twice older than $D$. Who is the second oldest $?$

Father's age is $4$ times that of his son. $5$ years back, it was $7$ times.Father 's age now is

In a group of buffaloes and ducks, the number of legs are $24$more than twice the number of heads. What is the number of buffaloes in the group?

What should come in place of question mark in the following given series?

$13, 13, 65, 585, 7605, 129285, ?$

Four years ago the ratio of the ages of A and B was $2 : 3$and after $4$ years it will become$5 : 7$.  Find they present ages.

Mrs. Lata was $3$ times as old as her son $8$ years ago. Their total age is $64$ years now. How old (in years) is Mrs. Lata now?

Which of the following order in descending order --

$16.04.1970$

$15.05.1970$

$18.06.1980$

$20.04.1970$

$25.05.1970$

$1$. $16.04.1970$

$2$.$15.05.1980$
$3$. $18.06.1980$

$4$. $20.04.1970$
$5$.$25.05.1970$

Father's age is twice that of his son's age. Thirty years back, father's age was four times that of son's age. What is the age of son now?

The ages of Samina and Suhana are in the ratio of $7 : 3$ respectively.After $6$ Years the ratio of their ages will be $5 : 3$. What is the difference in their ages?

Ram's present age is three times his son's present age and two-fifth of his father's present age. The average of the present ages of all of them is $46$ years. What is the difference between the Ram's son's present age and Ram's father's present age?

$9$ and $45$ are first and second terms respectively in a continued proportion, then the third proportional is _____.

What is the angle between the hour hand and the minute hand at this time if a clock is showing $3.45$ ?

1. Geeta's weight less than Reema
2. Geeta's weight more than Seema
3. Of all three girls Seema's weight least.

If the first two statements are true then third is -

Govind is $40 years$ old. He is twice as old as his son prem is now. How old was Prem seven years before?

Radha's present age is three years less than twice her age $12$ years ago. Also the respective ratio between Raj's present age and Radha's present age is $4 : 9$. What will be Raj's age after $5$ years ?