In the given figure, how many metallic balls are also heavy?

Which answer figure will complete the pattern in the question figure?

A prisoner introduced a boy who came to visit him to the jailor as “Brothers and sisters I have none, he is my father’s son’s son”. Who is the boy?

Select the correct option to replace question mark.
242, 343, 444, 545, ? 

Sarita is standing having her back towards the railways track. A train is running from her left to right. If the train smokes in the South, then direction of Sarita’s face is-

Select the set in which the numbers are related in the same way as are the numbers of the following sets. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E. g. 13 – Operations on 13 such as adding / subtracting / multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed)

(11, 33, 17)
(18, 44, 21)

In a row of girls, if Sujata is 10th from the left and Namrata is 9th from the right, interchange their positions, Sujata becomes 23rd from the left. How many girls are there in the row?