64 : ? :: 72 : 53

In the given figure, how, how many keys are duplication but not steel?

In a certain code language, "C" is written as  "24" and "EYE" is written as "46". How is "THE" written in that code language? 

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

In an office of 50 people, 18 write with their right hand, 26 write with their left hand and 2 can write with both hands. How many cannot write? 

Find the missing number?

The sum of the present ages of two cousins is 46 years. Eight year ago, the elder one was twice as old a the younger one. What is the present age of the elder cousin?

If in a particular language, PAPER is coded as QZQDS and PENCIL is coded as QDOBJK then how is SCIENCE coded in that language?