Quandaries
and Queries 

Hi My nane is Floren and I am a secondary student. Could you help me to solve this exercise?: The numbers 2^{1989} and 5^{1989} are written one after another. How many digits in all are there? Thanks for your help in advance. 

Floren, Ask yourself how you can estimate the number of digits of a number by taking its logarithm in base 10. Claude 

