The relation "has the same father as" over the set of children is:

The relation has the same father as' over the set of children (a) only reflexive (b) only symmetric (c) only transitive (d) an equivalence relation

The present age of a father is equal to the sum of the ages of his 5 children. 12 years hence, the sum of the ages of his children will be twice the ages of their father. Find the present age of the father.

The present age of a father is equal to the sum of the ages of his 5 children. 12 years hence, the sum of the ages of his children will be twice the ages of their father. Find the present age of the father.

Select the set in which the numbers are related in the same way as are the numbers of the following set. (4, 9, 16)

Select the set in which the numbers are related in the same way as are the numbers of the following set. (8, 39, 5)

Select the set in which the numbers are related in the same way as are the numbers of the following set. (145, 65, 115)

Select the set in which the numbers are related in the same way as are the numbers of the following set. (2, 4, 8)

Select the set in which the numbers are related in the same way as are the numbers of the following set. (16, 24, 88)