Divyadisha wrote:
Bunuel wrote:
The average price of an antique car increases over the years. If from 1990 to 1996, the price of the car increased by 13% and from 1996 to 2001 it increased by 20%, what is the price of the car in 2001 if the price in 1990 was $11,500?
A. $15,594.
B. $15,322.
C. $14,786.
D. $14,543.
E. $12,988.
11,500 *1.13*1.20= Units digit of this expression would be 4.
Only option A has units digit of 4. And hence is the answer
That's a really elegant solution! Quick question, how were you able to tell the units digit from 11,500*1.13*1.2. I'm only familiar with doing that for whole numbers.
I got as far as:
11,500*1.13*1.2 --> 115*113*1.2 and then I wasn't quite sure how to see the unit's digit coming to 4.
Thanks in advance!