How many biscuits had it eaten on the first day?

+1 vote
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Gauri's puppy was growing fast. In the first five days since she got it it had eaten 100 dog biscuits. If each day it had eaten 6 more than the previous day .
How many biscuits had it eaten on the first day?

posted May 22, 2014

2 Solutions

Let a be the # of Biscuits eaten 1st day.

So.

``````a + (a+6) + (a+6+6) + (a+6+6+6) + (a+6+6+6+6) = 100
5a + 60 = 100
``````

Thus,

``````a =  8 Biscuits.
``````

solution May 22, 2014
+1 vote

....................8...............

solution Dec 19, 2014

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