# Thread: Mental Math in Multiple Choice Problem

1. ## Mental Math in Multiple Choice Problem

hello all...

how to easy find & quickly in multiple choice :

any helps is greatly appreciated..

zidan

2. ## Re: Mental Math in Multiple Choice Problem

The one that takes the largest discount of the most expensive item. Oops, time is up!

3. ## Re: Mental Math in Multiple Choice Problem

all shop is given the same of total discount..how you determine the largest discount?
i mean by calculation..

4. ## Re: Mental Math in Multiple Choice Problem

Originally Posted by zidan3311
all shop is given the same of total discount..how you determine the largest discount?
i mean by calculation..

Now that the time limit seems to be up let's step back and take a look at this. How do you determine what the cost of the items are? Please show us whatever work you've been able to do.

-Dan

5. ## Re: Mental Math in Multiple Choice Problem

No need for calculations:
compare a to d: clearly d
compare b to c: clearly c
compare c to d: clearly d ...and d gets the business!

6. ## Re: Mental Math in Multiple Choice Problem

HI DenisB, how to compare it? i mean in shop a total = 35%, shop b=35%, shop c=35%, shop d=35%
would you show me how to compare it?