# Numbers Questions

A) 6393 | B) 5831 |

C) 6993 | D) 6339 |

Explanation:

(Place value of 7)-(face value of 7)

=7000-7=6993.

A) 1 | B) 2 |

C) 3 | D) 4 |

Explanation:

clearly 4864 is divisible by 4

So 9 P 2 must be divisible by 3.So(9+P+2) must be divisible by 3.

so P=1.

A) 3/5 | B) 3/10 |

C) 4/5 | D) 5/4 |

Explanation:

Let the required fraction be x. Then, (1 / x )- x = 9/20

1 - x^(2) / x = 9 / 20 => 20 - 20 * x^(2) = 9 * x.

20 * x^(2) + 9 *x - 20 = 0.

=> (4 * x + 5) (5 * x - 4) = 0.

=> x = 4 / 5.

A) 553681 | B) 555181 |

C) 555681 | D) 556581 |

Explanation:

987 = 3 * 7 * 47.

So, the required number must be divisible by each one of 3, 7, 47

553681 => (Sum of digits = 28, not divisible by 3)

555181 => (Sum of digits = 25, not divisible by 3)

555681 is divisible by each one of 3, 7, 47.

A) 8 | B) 9 |

C) 10 | D) 11 |

Explanation:

Here a = 3 and r = 6/3 = 2. Let the number of terms be n.

Then, t = 384 => a * r^(n-1) = 384

=> 3 * 2^(n-1) = 384 => 2^(n-1) = 128 = 2^(7)

=> n-1 = 7 => n = 8.