A) 2 | B) 3 |

C) 4 | D) 5 |

Explanation:

We have to find out even number - even number - odd number sequence.

There are four such such even numbers: 6,8,2 and 8.

A) 1 | B) 4 |

C) 6 | D) None of these |

Explanation:

The 2nd, 5th and 8th digits of the number 31549786 are 1, 9 and 6 respectively.

The perfect square of a two - digit even number, formed using the digits 1, 9 and 6 is 196. And,

So, the required even number is 14. Clearly, its second digit is 4.

Hence, the answer is (b).

A) None | B) one |

C) Two | D) Three |

A) 10 | B) 9 |

C) 8 | D) 6 |

Explanation:

**Given Number : **2 5 6 7 3 9 4 8

**Ascending order : **2 3 4 5 6 7 8 9

Specified letters are 6 and 4 respectively.

required sum = (4 + 6 =) 10

A) 473 & 382 | B) 629 & 728 |

C) 629 & 847 | D) 728 & 847 |

Explanation:

The given numbers are :

382 473 568 728 847 629

When changes are made as given in the question, numbers become as follows :

238 347 856 872 784 962

Again now, find out the difference between the numbers given in options as given below:

(1) 473 - 382 => 347 - 238 = 109

(2) 629 - 728 => 962 - 872 = 90

(3) 629 - 847 => 962 - 784 = 178

(4) 728 - 847 => 872 - 784 = 88

A) 567 | B) 284 |

C) 865 | D) 738 |

Explanation:

Here the given numbers are

567 284 696 865 738

When 1 is added to the last digit of each of the above numbers, it becomes as follows :

568 285 697 866 739

After reversing the order of digits , we get

865 582 796 668 937

Now , when the numbers are arranged in ascending order their order becomes as follows:

582 668 796 865 937

Hence , the fourth number is 865 (a number formed by 567). Therefore option(1) is correct answer.