Suppose age of Laxmi is x years.

The difference of their ages

Ratio of their ages after 3 years = =

= 12 : 36 = 1 : 3

A) 41 yrs | B) 40 yrs |

C) 37 yrs | D) 33 yrs |

Explanation:

Let the present ages of Ajay and Vijay be 'A' and 'V' years respectively.

=> A - 8 = 4/3 (V - 8) and A + 8 = 6/5 (V + 8)

=> 3/4(A - 8) = V - 8 and 5/6(A + 8) = V + 8

V = 3/4 (A - 8) + 8 = 5/6 (A + 8) - 8

=> 3/4 A - 6 + 8 = 5/6 A + 20/3 - 8

=> 10 - 20/3 = 10/12 A - 9/12 A

=> 10/3 = A/12 => A = 40.

A) 84 yrs | B) 96 yrs |

C) 116 yrs | D) 108 yrs |

Explanation:

Let the present ages of the mother and daughter be 2x and x years respectively.

Then, (2x - 18) = 3(x - 18) => x = 36

Required sum = (2x + x) = 108 years.

A) 6 years | B) 8 years |

C) 10 years | D) 12 years |

Explanation:

Ram age when he was born = 0 years

=> His brother's age = 6 year

=> His father's age = brother age + 32years = 6+32 = 38

=> His mother's age = father's age - 3 = 35

So sister's age = 35-25 = 10years.

A) 22 yrs | B) 21 yrs |

C) 20 yrs | D) 24 yrs |

Explanation:

Let Reena’s present age be 'K' yrs.

Given:{(K+3) x 4} - {(K-3) x 3)}

=> K = 21 yrs

So her present age is 21 yrs.

Then, her age after 1 year is 22 yrs.

A) 50 yrs | B) 47 yrs |

C) 45 yrs | D) 42 yrs |

Explanation:

Let age of retirement = S

so according to the given condition 25000(x-20)

=10000 x 3 + 12000 + 14000 + 16000 + 18000 + 20000 + 22000 + 24000 + 26000 + 28000 + 30000 + 30000(S-33)

= 30000 + 210000 + 30000S-990000

= 30000S - 750000

or 25000S - 500000 = 30000x - 750000

or 5000x = 250000

or S = 50 yrs.