Missing Digits

Find the missing number, and explain why.

25         49            121

5            7               ?

15          13            9

20         20             20

 

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January 23rd, 2012 | Category: Mathematical |  Email This Riddle

2 guesses to Missing Digits

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• Vandal

  January 23, 2012 at 4:14 PM

  11. Square root of 25 is 5, of 49 is 7, and of 121 is 11. Also, 5+15=20, 7+13=20, and 11+9=20.

• Dude

  January 23, 2012 at 9:08 PM

  Correct Vandal.

  You are today’s winner.