In which year was the first Economic Census carried out

Select the number from among the given options that can replace the question mark (?) in the following series.

218, 231, 248, 267, ?

In a certain code language, RING' is coded as 'UMQK'. What is the code for 'SAFE' in that code language? 

In a certain code language. 'COCK' is written as 'EQEM', and 'DUCK' is written as 'FWEM'. How will 'SWAN' be written in that language?

Four words have been given, out of which three are alike in some manner and one is different. Select the odd one.

Select the odd pair of words from the following options.

If 1^st January 1997 was a Wednesday, what was the day of the week on 24^th June 1997?

What should come in place of ? in the given series based on the English alphabetical order?

ACE, FHJ, KMO, PRT , ?

If  '+' means '–', '–' means '÷', '÷' means '×' and '×' means '+', then what will come in place of the (?) in the following equation?