Identify the correct option to complete the following series.
1, 3, 5, 11, 21, 43, 85, 171,___

In a certain code language, “MOBILE” is written as “OQDKNG”. How is “RANGER” written in that code language?

Starting from house Abhijit walked 30 meters in North west direction. Then he walked 30 m. in south - west direction. Then he walked 30 m. in north - east direction. Now he is how much distance away from his house. 

Direction (13-15): Study the following information to answer the given questions:
A building has seven floors numbered one to seven, in such a way that the ground floor is numbered one, the floor above it, number two and so on such that the topmost floor is numbered seven. One out of seven people viz. A, B, C, D, E, F and G lives on each floor. A lives on Fourth floor. E lives on the floor immediately below F’s floor. F does not live on the second or the seventh floor.
C does not live on an odd numbered floor. B does not live on a floor immediately above or below C’s floor. D does not live on the topmost floor. G does not live on any floor below E’s floor.

Four of the following five are alike in a certain way and so form a group. Which is the one does not belong to the group?

Read the given information carefully and answer the following questions.
Seven businesses and their own businesses are doing practice in different cities - Chennai, Bangalore, Hyderabad, Mumbai, Ahmedabad, Jaipur and Bhubaneswar, but not necessarily in this order. Each has a different profession, not necessarily in the same order on doctor, engineer, pharmacist, lawyer, counsellor, professor and artist.
A is a Pharmacist and practices in Bhubaneshwar D practices in Bangalore but is not a doctor or artist. Is a practicing professor in Hyderabad. G is a counsellor and does not practice in Mumbai or Chennai. E is a lawyer and practices in Ahmedabad. F practices in Chennai but is not an artist. C practices in Mumbai

Which of the following combination of occupation and location is correct?

Direction : Six laptops O, R, Q, M, S and B are placed in a row facing towards the north (Not necessarily in the same order). O is placed to the immediate left of B. S is placed second to the left of R. Q is placed second to the right of B. Q is placed to the immediate right of S. M is placed to the left of O.

Which laptop is placed to the immediate right of M.?

If '+' means '÷', '–' means '+', '×' means '–' and '÷' means '×' then, 8 ÷ 4 - 6 + 3 × 4 =?  

Find odd in the following