The second number in the given number pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) are followed in all the number pairs, EXCEPT one. Find that odd number pair.

In a certain code language, 'GREAT' is codedas '2015187', 'WORK' is codedas '11181523' and 'GOING' is codedas '7149157'. How will ‘WELL' be codedin that language?

Which of the following numbers will replace the question mark (?) in the given series?
 10, 20 , 23, ?, 97, 582

Which letter-cluster will replace the question mark (?) to complete the given series?
 ERKV, HYVK, ?, NMRO, QTCD

Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.
 57 * 35 * 44 * 11 * 13 * 40 

Select the number-pair in which the two numbers are related in the same way as the two numbers of the pair given below.
 10 : 24

If BANKER is coded as CAMKFR, then how would INDIAN be coded?

If the signs – and ÷ are interchanged, then which of the following equations would be correct?