Verbal Reasoning - Mental Ability Questions

If '/' denotes 'subtraction', '-' denotes 'addition', '+' denotes 'multiplication' and 'x' denotes 'division', which of the following is the value of the expression

182/91x7+3-1

The missing number in the series 9 81 ? 6561 59049

Rajitha has a calculator, which has 10 digits. She want to clean the calculator by removing all the keys and while reassembling it, she interchanged the locations of 3 pairs of keys. For example, if she placed the key ‘3’ in the place of the key ‘7’, she placed the key ‘7’ only in the place of the key ‘3’ and not any other key. All keys that were interchanged corresponded only to numbers. Later, she input some calculations and obtained outputs as provided in the table below. The input is shown in terms of the keys that Kavitapressed, while the output is the output displayed by the calculator.

Output:

1.   95 + 84=128
2.   128 + 64=195
3.   912 + 43=942
4.   178 + 19=192

Question :

Which of the following pair of digits is unchanged ?

Priya cycles 5 km North, then turns East and cycles 4 km, then turns South and cycles 5 km, then turns to her right and cycles 6 km. Where is she now with reference to her starting position?

Three of the following four are alike in a certain way and hence form a group. Which is the one that does not belong to that group?

Which set of letters when sequentially placed at the gaps in the given letter series shall complete it?
_qr_srq_p_rs_r_p

Synonym for the word : Bleak

Find out the wrong term in the series 83,92,85,90,85,88