Answer:
23
Step-by-step explanation:
To find the Greatest Common Factor, or GCF, we need to factor the first 2 numbers and then find the greatest number that is both present in the prime factorization of both numbers.
253 = 1 * 11 * 23
345 = 3 * 5 * 23
Since 23 is both present in both numbers and is the greatest, the GCF of 253 and 345 is 23.
Modern numbers are the ten numerical digits used in constructing other numbers.
<h3>What are modern numbers?</h3>
Modern numbers are also called Arabic numerals. They are the ten numerical digits:
0, 1, 2, 3, 4, 5, 6, 7, 8 and 9.
Uses of modern numbers;
- They are used as symbols to write decimal numbers.
- They are used in writing numbers in other systems like the octal, and for writing identifiers such as computer symbols, trademarks, or license plates.
- They are used in constructing other numbers.
Hence, modern numbers are the ten numerical digits used in constructing other numbers.
Learn more about modern numbers here:
https://brainly.in/question/20910128
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This is the scientific notation >> 8.6 × 10-1