Calendar of 1991 could be used again? 

In a certain code language, PINK is written as GREEN, GREEN is written as YELLOW, YELLOW is written as RED, RED is written as WHITE and WHITE is written as INDIGO, then in the same code language what is the colour of BLOOD?

Choose the correct option from the following options.
AZYB : CXWD ∷ BYWD :?

In the following question find out the missing number?

If Ram runs less fast than Shyam and Shyam runs as fast as Lal but less fast than Tom. Who runs fastest? 

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

aa_baa_aaa_ba_ba

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 ?