One day Krishnayya and his 10-year-old granddaughter Subbu are having the following conversation:

Subbu: Grandpa, When were you born?
Krishnayya then gave a Mathematical puzzle to his granddaughter to solve.

Grandfather: Kid, I am 8 more than 6 times your age by now (2015).
Subbu started thinking. Being good at Mathematics, Subbu screamed her grandpa's year of birth in less than a minute.
Which year do you think he was born?
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Solution

Subbu's age is $10$ years now. So her grandpa's age is
$8 + 6 \times 10 = 8 + 60 = 68$
Grandpa is $68 y e a r s$ old by $2015$ . So he was born in $1947$ .

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Similar questions

One day Krishnayya and his $10 y e a r$ old granddaughter Subbu are having the following conversation:

Subbu : Grandpa, When were you born?
Krishnayya then gave a Mathematical puzzle to his granddaughter to solve.

Grandfather: Kid, I am $8$ more than $6 t i m e s$ your age by now( $2015$ ).
Subbu started thinking. Being good at Mathematics, Subbu screamed her grandpa's year of birth in less than a minute.
Which year do you think he was born?

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One day Krishnayya and his 10 year old granddaughter Subbu are having the following conversation:

Subbu : Grandpa, What is your age?
Krishnayya then gave a Mathematical puzzle to his granddaughter to solve.

Grandfather: Kid, I am 8 more than 6 times your age.

The Grandfather's age is

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Subbu's age is 10 years now. So her grandpa's age is 8+6×10=8+60=68 Grandpa is 68years old by 2015. So he was born in 1947.

Subbu's age is $10$ years now. So her grandpa's age is
$8 + 6 \times 10 = 8 + 60 = 68$
Grandpa is $68 y e a r s$ old by $2015$ . So he was born in $1947$ .