Verbal Reasoning - Mental Ability Questions

Who among the following economists gave the concept of "economies of scale". Which says "many goods and  services can be produced more cheaply in long series"?

In a certain code language, "SPICEY" is written as "ELOUAY" and "PONDER" is written as "JKLNAZ". How is "HOUSED" written in that code language?

Meet starts cycling early in the morning, facing the Sun. After some time, he takes a 45° turn to his leftand then again turns 80° towards his left. In which direction is he now with respect to his initialposition?

If 18∆4 = 11, 16∆8 = 12 and 6∆12 = 9, then find the value of 18∆14 = ?

In the following question, various terms of an alphanumerical series are given with one or more terms missing as shown by (?). Choose the missing terms out of the given alternatives. D-4, F-6, H-8, J-10, ?, ?

X2+X2 =

Sanmitra walked 8 m towards the north. He turned to his right and walked 16m , then he turned to his left and walked 5 m and again he turned to his left and walked 16 m. In which direction is he from his starting point ?

Five friends are standing in a line. Nishu is taller than Riya but shorter than Pooja. Amrita is the shortest.Riya is shorter than Nishu but taller than Nikita. Who is the second tallest?