Which of the following entities is responsible for

Select the number from among the given options that can replace the question mark (?) in the following series.

61, 95, 138, 197, 279, ?

Identify the figure given in the options which when put in place of ‘?’ will logically complete the series.

Three of the following four letter-clusters are alike in a certain way and one is different.

Pick the odd one out.

If '+' means '×', '×' means '–', '–' means '÷' and '÷' means '+', then what will come in place of the (?) in the following equation?

Select the Venn diagram that best represents the relationship between the following classes.

Rivers, Ganga, Water bodies

‘A # B’ means ‘A is the brother of B’.

‘A @ B’ means ‘A is the daughter of B’.

Select the set in which the numbers are related in the same way as are the numbers of the following sets.

Four letter-clusters have been given, out of which three are alike in some manner and one is different. Select the letter-cluster that is different.

Select the term from among the given options that can replace the question mark (?) in the following series.

D4W, G5T, K9P, ?, S23H, V37E