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 not divisible by either 5 or 7. (b) are divisible by 5 or by 7 (inclusive or). (c) are divisible by 5 and by 7. (d) are divisible by 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 not divisible by either 5 or 7. (b) are divisible by 5 or by 7 (inclusive or). (c) are divisible by 5 and by 7. (d) are divisible by 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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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 not divisible by either 5 or 7.
(b) are divisible by 5 or by 7 (inclusive or).
(c) are divisible by 5 and by 7.
(d) are divisible by 7.
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