Sue the T-Rex grows cabbage in a square shaped garden. Each cabbage takes 1 ft^21ft2 of area in the garden. This year, she increased her output by 211 cabbages compared to last year, If the shape remains a square how many cabbages did she grow this year?

1 Answer
May 18, 2016

Sue the T-Rex grew 1123611236 cabbages this year.

Explanation:

Squares of numbers follow the series {1,4,9,16,25,36,49,......}

and difference between consecutive squares is the series

{1,3,5,7,9,11,13,15,.......} i.e. each term (2n+1) times the previous one.

Hence if output has increased by 211=2*105+1, it should be 105^2 last year i.e. 11025 last year and 11236 this year, which is 106^2.

Hence, she grew 11236 cabbages this year.