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The total age of A & B is 12 years more than the total age of B & C. C is how many year younger than A?

A और B की कुल आयु, B और C की कुल आयु से 12 वर्ष अधिक है। C, A से कितने वर्ष छोटा है?

A) 15

B) 14

C) 13

D) 12

Correct Answer : 12

Explanation : From the given data
A+B = (B+C)+12
A+B-(B+C) = 12
A-C = 12 years
C is 12 years younger than A

The ratio of the present age of P & Q is 6:7. If Q is 4 years old than P. What will be the ratio of the ages of P & Q after 4 years?

P & Q की वर्तमान आयु का अनुपात 6:7 है। यदि Q, P से 4 वर्ष बड़ा है। 4 वर्ष बाद P और Q की आयु का अनुपात क्या होगा?

A) 2:5

B) 5:8

C) 6:7

D) 7:8

Correct Answer : 7:8

Explanation : The present age of P & Q is 6:7
Q is 4 years old than P i.e Q = P+4.
i.e
P / Q = 6 / 7
P/ P+4 = 6/7
7P-6P = 24
present age of P = 24

present age of Q = P+4 =24+4 = 28

After 4 years the ratio of P & Q is
P+4 : Q+4 => 24+4 : 28+4
=> 28:32
=> 7:8

The ratio of the age of a man & his wife is 4:3.After 4 years this ratio will be 9:7. If the time of marriage the ratio was 5:3, then how many years ago were they married?

एक आदमी और उसकी पत्नी की उम्र का अनुपात 4:3 है। 4 साल बाद यह अनुपात 9:7 हो जाएगा। यदि विवाह के समय अनुपात 5:3 था, तो उनकी शादी कितने वर्ष पूर्व हुई थी?

A) 15

B) 12

C) 10

D) 8

Correct Answer : 12

Explanation : The age of a man is 4x and age of his wife is 3x.
After 4 years their ratio's will be 9:7
i.e
4x+4 / 3x+4 = 9 / 7
28x-27x=36-28
x = 8
Age of a man is 4x = 4*8 = 32 years.
Age of his wife is 3x = 3*8 = 24 years.

Let us assume 'y' years ago they were married ,
the ratio was 5:3
i.e
32-y / 24-y = 5/ 3
96-3y = 120-5y
2y=24
y = 12 years
i.e 12 years ago they were married

Sneha's age is 1/6th of her father's age. Sneha's father's age will be twice the age of Vimal's age after 10 years. If Vimal's eight birthday was celebrated two years before, then what is Sneha's present age?

स्नेहा की आयु उसके पिता की आयु की 1/6 है। 10 वर्ष बाद स्नेहा के पिता की आयु विमल की आयु की दोगुनी होगी। यदि विमल का आठवां जन्मदिन दो वर्ष पहले मनाया गया था, तो स्नेहा की वर्तमान आयु क्या है?

A) 12 years

B) 10 years

C) 7 years

D) 5 years

Correct Answer : 5 years

Explanation : Assume Sneha's age is 'x', her father's age is 'y' years and Vimal's age 'v'
Sneha's age is 1/6 th of her fathers age
i.e x = y /6.
Father's age will be twice of Vimal's age after 10 years.
i.e y+10 = 2( v+10)

Vimal's eight birthday was celebrated two years before, Then the Vimal's present age is 10 years.
Y+10 = 2(10+10)
Y=30 years.

Sneha's present age x = y/6 = 30/6 = 5 years.

The sum of the ages of 5 children born at the intervals of 3 years each is 50 years. What is the age of the youngest child?

प्रत्येक 3 वर्ष के अंतराल पर पैदा हुए 5 बच्चों की आयु का योग 50 वर्ष है। सबसे छोटे बच्चे की उम्र क्या है?

A) 4 years

B) 6 years

C) 8 years

D) 10 years

Correct Answer : 4 years

Explanation : Let the age of the youngest child be x years
and age of the children's be x ,x+3, x+6, x+9, x+12.

then x+(x+3)+(x+6)+(x+9)+(x+12) = 50
5x+30 = 50
5x = 20
x = 4
Age of the youngest child is x = 4 years

If 6 years are subtracted from the present age of Gagan and the remainder is divided by 18, then the present age of his grandson Anup is obtained. If Anup is 2 years younger to Madan whose age is 5 years, then what is Gagan's present age?

यदि गगन की वर्तमान आयु में से 6 वर्ष घटाया जाता है और शेष को 18 से विभाजित किया जाता है, तो उसके पोते अनूप की वर्तमान आयु प्राप्त होती है। यदि अनूप मदन से 2 वर्ष छोटा है जिसकी आयु 5 वर्ष है, तो गगन की वर्तमान आयु क्या है?

A) 96 years

B) 84 years

C) 60 years

D) 48 years

Correct Answer : 60 years

Explanation : Let us assume Gagan present age is 'x' years.
Anup age = 5-2 = 3 years.
(x-6) / 18 = 3
x-6 = 54
x = 60 years

My brother is 3 years elder to me. My father was 28 years of age when my sister was born while my mother was 26 years of age when i was born. If my sister was 4 years of age when my brother was born,then what was the age my father and mother respectively when my brother was born?

मेरा भाई मुझसे 3 साल बड़ा है। जब मेरी बहन का जन्म हुआ तब मेरे पिता की उम्र 28 वर्ष की थी जबकि मेरे जन्म के समय मेरी माँ की आयु 26 वर्ष थी। यदि मेरे भाई के जन्म के समय मेरी बहन की आयु 4 वर्ष थी, तो मेरे भाई के जन्म के समय क्रमशः मेरे पिता और माता की आयु कितनी थी?

A) 32 years, 23 years

B) 32 years, 29 years

C) 35 years, 29 years

D) 35 years, 33 years

Correct Answer : 32 years, 23 years

Explanation : Father was 28 years of age when my sister was born.
My brother was born 4 years after my sister was born.
Then Father's age when brother was born = 28+4 = 32 years.

Mother was 26 years of age when I was born.
My brother was born 3 years before I was born,
Then Mother's age when brother was born = 26-3 = 23 years.