(a) How many even numbers less than 500 can be formed using the digits 1, 2, 3, 4 and 5? Each digit may be used only once in any number. te [4]

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter2: Working With Real Numbers
Section2.7: Problem Solving: Consecutive Integers
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I don't get why for 2 digit even numbers there can be 8 possibilities and for 3 digit even numbers there can be 18. Someone explain please.

(a) How many even numbers less than 500 can be formed using the digits 1, 2, 3, 4 and 5? Each digit
may be used only once in any number.
[4]
Transcribed Image Text:(a) How many even numbers less than 500 can be formed using the digits 1, 2, 3, 4 and 5? Each digit may be used only once in any number. [4]
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