Find the odd word from the given figure?

The following equation is incorrect. Which two signs should be interchanged to correct the equation?
12 + 10 - 28 ÷ 7 x 4 = 48

In each of the following questions, four numbers are given out of which three are like in some manner while one is different. Choose the one which is different from the rest three?

Which one will replace the question mark?

Kanna is taller than Malik. Dev is shorter than Krish where as Krish is taller than Malik. Veena is shorter than Krish but taller than Malik and Dev is taller than Veena. Who is the Shortest ? 

In alphabet series, some alphabets are missing which are given in that order as one of the alternatives below it. Choose the correct alternative.
m _ nm _ n _ an _ a _ ma_

aa_baa_aaa_ba_ba

Complete the following alphabet series.
ABC, PQR, DEF, STU, ?