Suppose the ages of three persons are x, 2x, 3x years respectively

Hence, age of youngest person = x = 30 years.

A) 2 yrs | B) 4 yrs |

C) 3 yrs | D) 5 yrs |

Explanation:

29 x 2 = 58

20 x 3 = 60

-----------

2 years

Therefore, the age of child is 2 years.

A) 32 yrs | B) 29 yrs |

C) 24 yrs | D) 27 yrs |

Explanation:

Total age seven persons = (26 x 7)years

Total age of the first three persons and the last three persons are (19 x 3) years and (32 x 3) years respectively.

Age of the person sitting in the middle of the row = 26 x 7 - 19 x 3 - 32 x 3 = 182 - 57 - 96 = 29 years.

A) 36 yrs | B) 38 yrs |

C) 40 yrs | D) 42 yrs |

Explanation:

Let the mother's present age be x years.

Then, the person's present age = 2/5 x years.

(2x/5 + 8) = 1/2 (x + 8)

2(2x + 40) = 5(x + 8) => x = 40.

A) 2 yrs | B) 12 yrs |

C) 18 yrs | D) 6 yrs |

Explanation:

Let Siya's age = x

Then Riya's age = 4x

But given Riya's age = 24

=> 4x = 24 => x = 6

Hence Siya's age = 6 yrs

=> The age difference = 24 - 6 = 18 yrs.

A) 11.8 | B) 12.9 |

C) 13.7 | D) 14.5 |

Explanation:

Let the present ages of Mahesh, Nilesh and Ramesh be k, l and m respectively.

k/l = 5/x ------ (1)

k = m - 18 ------ (2)

m + 9 = 47 ------ (3)

k - l = m ----- (4)

(3) => m = 47 - 9 = 38 years

(2) => k = 38 -18 = 20 years

(1) => 20/l = 5/x => l = 4x

(4) => 4x - 20 = 38

=> 4x = 58 => x = 14.5