Find how many positive integers with exactly four decimal digits, that is, positive integers between 1000 and 9999 inclusive, have the following properties: (a) are divisible by 7. 1286 (b) have distinct digits. 4536 (c) are divisible by 5 and by 7. 257 (d) are not divisible by either 5 or 7.
Find how many positive integers with exactly four decimal digits, that is, positive integers between 1000 and 9999 inclusive, have the following properties: (a) are divisible by 7. 1286 (b) have distinct digits. 4536 (c) are divisible by 5 and by 7. 257 (d) are not divisible by either 5 or 7.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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