Questions about the world of GMAT Math from other sources and general math related questions.
ShaheerH446
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Coins Coins Coins

by ShaheerH446 Fri Aug 25, 2017 3:27 pm

I came across this and the solution literally adds each possible combination. Is there a better way to solve the question?

In how many different ways can pennies (1 cent), nickels (5 cents), dimes (10 cents), and quarters (25 cents) be combined for a total of $1.10 (110 cents), if at least one of each type of coin must be included?
(A) 36

(B) 51

(C) 70

(D) 87

(E) 101
Sage Pearce-Higgins
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Re: Coins Coins Coins

by Sage Pearce-Higgins Tue Sep 05, 2017 9:18 am

Just looking at the answers tells you that thinking of all the cases separately is going to be too time-consuming. We need to look for patterns. Before I go into more detail, please can you provide the source for this question?