<PRE><B>Question 86869</B>
Two digits of this number were erased: 273*49*5. However we know that 9 and 11 divide the number. What is it? 
:
Here is one way you can do it, about 10 min on a calculator:
Last digit is a five, we have 3 factors: 11 * 9 * 5 = 495
:
Start on the high end, make the missing numbers both 9:
27394995/495 = 55343.424242
Strip off the decimal:
495 * 55343 = 27394785, (our highest multiply of 495 within this number)
:
Start with this number on a calc, subtract 495 until you read a number that
satisfies the statement
:
I used a Ti83 table, an equation of y = x-495. Table setup: start 27394785
Increment of -495, scrolled down looking at y; Got a value 27374985 after 
scrolling down about 46 number. Missing numbers  are 7 and 8
:
Check, using the given factors
 27374985/9 = 3041665
 27374985/11 = 2488635</PRE>