In the following series find the missing numbers.
21, 26, 33, 42, 53,?

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?

Find the number of square?

Which of the following cube in the answer figure cannot be made based on the unfolded cube in the question figure?

In the following question, select the related number from the given alternatives.
328: 4:: 366: ?

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

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