Trivia

Subject:
Friday Puzzler -- Missing Number

Alexy
In each line of the set of numbers below, the two numbers on a given line are used to generate the left number on the next line, using a well-defined rule. What number replaces the question mark? This is much harder than it might initially appear ;-)

72 99
27 45
18 39
21 36
? 28
13 21
7

Messages In This Thread

Friday Puzzler -- Missing Number
Re: Friday Puzzler -- Missing Number
Correct!
Re: Correct!
© 1998 - 2017 by Ellis Walentine. All rights reserved.
No parts of this web site may be reproduced in any form or by
any means without the written permission of the publisher.

WOODCENTRAL, P.O. BOX 493, SPRINGTOWN, PA 18081