Pop Quiz

A grandfather and his grandson have the same birthday date. For six consecutive birthdays the grandfather was a multiple of the grandson’s age. How old were each at the sixth of these birthdays?

Share:

• Click to email a link to a friend (Opens in new window)
• Click to print (Opens in new window)
• Click to share on Facebook (Opens in new window)
• Click to share on LinkedIn (Opens in new window)
• Click to share on Reddit (Opens in new window)
• Click to share on Twitter (Opens in new window)
• Click to share on Tumblr (Opens in new window)
• Click to share on Pinterest (Opens in new window)

January 27th, 2013 | Category: Brain Riddle, Mathematical |  Email This Riddle

3 guesses to Pop Quiz

Warning: Use of undefined constant bfa_comments - assumed 'bfa_comments' (this will throw an Error in a future version of PHP) in /home/customer/www/riddledude.com/public_html/wp-content/themes/atahualpa/comments.php on line 132

• anant

  January 28, 2013 at 12:03 AM

  6 and 66

• Molly

  January 28, 2013 at 7:31 AM

  Yeah, the first year the grandson is 1 and the grandfather is 61

• Dude

  January 28, 2013 at 8:54 PM

  Great job, Anant.

  Grandfather 66 and grandson 6 is correct.

  Grandfather Grandson
  61 1 (61 = 1 x 61)

  62 2 (62 = 2 x 31)

  63 3 (63 = 3 x 21)

  64 4 (64 = 4 x 16)

  65 5 (65 = 5 x 13)

  66 6 (66 = 6 x 11)
  So on the sixth birthday, they are 66 and 6 respectively

  You are today’s winner.