Examples(Set 2) - Age
8. X is two years older than Y who is twice as old as Z. The total of the ages of X, Y and Z is
27
. How old is Y?
A.
10
B.
9
C.
7
D.
8
Explanation:
A=2+B
B=2C
A+B+C=27
A=12,B=10,C=5
B=10
9.The average age of a class of
22
students is
21
years. The average increased by
1
when the teacher's age also included. What is the age of the teacher?
A.
48
B.
45
C.
44
D.
43
Explanation:
Total age of students =22×21
Total age of students + age of teacher =23×22
Age of the teacher=23×22−22×21
=22(23−21)=22×2
=44
10. The sum of ages of
4
children born at the intervals of
3
years each is
38
years. Find out the age of the youngest child?
A.
5
years
B.
6
years
C.
4
years
D.
3
years
Answer: Option A
Explanation:
let the age of the youngest son be Y
Y+(Y+3)+(Y+6)+(Y+9)=38
Y=5
11.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, what was the son's age five years back?
A.
18
years
B.
14
years
C.
22
years
D.
20
years
Answer: Option B
Explanation:
Let Father's present age be F
Let son's present age be S
F=38
38-S=S
S=19
S-5=14
12. Virat's age is
1
/
6
th of her father's age. Virat's father's age will be twice Padikal's age after
10
years. If Padikals's eight birthdays was celebrated two years before, then what is Virat's present age.
A.
10
B.
12
C.
5
D.
8
Explanation:
let Virat's age be V
Let Father's age be F
Let Padikal's age be P
V=F/6
F+10 =(P+10)*2
P=10
F=30,V=5
V=5
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