Name the person who presented the scheme to link Indian

Select the set of classes the relationship among which is best illustrated by the Venn diagram given below.

In a certain code language, 'NAIL' is coded as '2637' and 'LANE' is coded as '3278'. What is the code for 'E' in the given code language?

In a certain code language, 'COURT' is coded as OCRTR and 'JUDGE' is coded as UJAEG. How will 'ORDER' be coded in the same language?

Which of the following numbers will replace the question mark (?) in the given series? 

19, 26, ?, 46, 59, 74

Which of the following letter-clusters will replace the question mark (?) in the given series?

LOK, JMI, HKG, FIE, ?

Identify the figure that completes the pattern (rotation is NOT allowed).

Select the option that represents the letters that, when sequentially placed from left to right in the blanks below, will complete the letter series.

After interchanging the given two signs what will be the values of equation (I) and (II) respectively?

 × and ÷ 

a) Those who are honest are good teachers.

b) Hard working people are honest.

Inference: Hard work is the necessary quality of a good teacher.