question_answer

Find the greatest number which will divide the greatest 3-digit number and the greatest 4-digit number exactly.

A)  9

B)  8

C)  7

D)  3

Correct Answer: A

Solution :

The greatest 3-digit number = 999 The greatest 4-digit number = 9999 The greatest number which will divide both 999 and 9999 exactly is their HCF. \[\therefore \] HCF (999, 9999) = 9