A) 10.25 % | B) 8.16 % |

C) 9.63 % | D) 0.16 % |

Explanation:

Let the sum be Rs. 100. Then,

S.I. for first 6 months = (100 x 8 x 1) / (100 x 2) = Rs. 4

S.I. for last 6 months = (104 x 8 x 1) / (100 x 2) = Rs. 4.16

So, amount at the end of 1 year = (100 + 4 + 4.16) = Rs. 108.16

Effective rate = (108.16 - 100) = 8.16%.

A) Rs. 22.5 | B) Rs. 2.5 |

C) Rs. 202 | D) Rs. 25 |

Explanation:

We know that I = PTR/100

=> P = 20250/4.5 = 4500

Now, new Interest at 5% = 4500x1x5/100 = 225

Now the additional amount = 225 - 202.5 = Rs. 22.5

A) 240 paise | B) Rs. 1.40 |

C) Rs. 2.20 | D) Rs. 3 |

Explanation:

I = PTR/100

I = 25 x 4 x 0.03/100

I = 0.03 x 100 = 300 Ps = Rs. 3

A) 45/7 % | B) 50/9 % |

C) 51/7 % | D) 47/ 9 % |

Explanation:

Let sum = S. Then, amount = 7S/6

S.I. = 7S/6 - S = S/6; Time = 3 years.

Rate = (100 x S) / (S x 6 x 3) = 5 5/9 = 50/9 %.

A) Rs. 580 | B) Rs. 480 |

C) Rs. 550 | D) Rs. 470 |

Explanation:

Let the sum be Rs. P. Then,

= 510

P[ - 1] = 510.

Sum = Rs. 1920

So, S.I. = (1920 x 25 x 2) / (2 x 100) = Rs. 480