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Understanding how to spell numbers in English is a fundamental skill that comes in handy in various aspects of daily life. The number 84, for instance, is written as “eighty-four.” Whether you’re writing a check, filling out a form, or simply expanding your numerical literacy, knowing the correct spelling of numbers is crucial. Beyond its spelling, the number 84 has interesting properties: it is an even number, a composite number, and it is also the product of the prime numbers 2, 2, 3, and 7 (2 × 2 × 3 × 7). This article will delve into the spelling of the number 84, providing clear examples and practical applications to ensure you master this basic yet essential concept, while also exploring its mathematical properties.
Table of Contents
What is 84?
The number 84 is a natural number that comes after 83 and before 85, and it is spelled as “eighty-four.” It is an even and composite number, with divisors including 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, and 84. Its prime factorization is 22×3×72^2 \times 3 \times 722×3×7. Commonly used in various contexts such as counting, measurements, and everyday situations, understanding the properties and applications of 84 enhances numerical literacy and provides a deeper appreciation for its role in mathematics and daily life.
84 in Words in English
The number 84 in words is written as “eighty-four.” Here are the mathematical properties of the number 84:
- 84 is not a prime number. It has multiple factors: 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, and 84.
- A perfect square is a number obtained by squaring an integer (e.g., 4 is a perfect square because 2 x 2 = 4). A perfect cube is a number obtained by cubing an integer (e.g., 8 is a perfect cube because 2 x 2 x 2 = 8). 84 is neither a perfect square nor a perfect cube.
- The Fibonacci sequence is a famous sequence where each number is the sum of the two preceding numbers (starting from 0 and 1). 84 is not part of the Fibonacci sequence.
Also Read: What is the 2-3-5-7 Study Method?
How to Convert 84 in Words?
The number system relies on the concept of place value, where the position of a digit determines its significance. This principle extends to writing numbers in words, particularly for multi-digit numbers like 84. Here are the steps to convert 84 to words using the place value system:
- In the number 84, the digit “8” occupies the tens place. This signifies eight groups of ten (8 x 10). The digit “4” resides in the one’s place, representing four individual units.
- While directly stating “eight tens” might be grammatically correct, the established convention within the number system assigns a specific term for multiples of ten. In this case, “eight tens” is replaced with “eighty.”
- To accurately represent 84 in words, we combine them with each place value. “Eighty” accounts for the eight groups of ten, and “four” addresses the remaining four individual units.
- By combining “eighty” and “four” with a hyphen for clarity, we arrive at the final written form: “eighty-four.”
Solved Examples on 84 in Words
Q1. What is the sum of seventy-four and ten?
- Given numbers: 74 and 10.
- Sum = 74 + 10 = 84.
- Therefore, the sum of seventy-four and ten is “eighty-four.”
Q2. What is the product of twelve multiplied by seven?
- Given expression: 12 * 7.
- Product = 12 * 7 = 84.
- So, the product of twelve multiplied by seven is “eighty-four.”
Q3. If you have fifty-four apples and someone gives you thirty more, how many do you have in total?
- Total = 54 + 30 = 84.
- Hence, the total number of apples after receiving thirty more to fifty-four is “eighty-four.”
Q4. What is the difference between ninety and six?
- Given numbers: 90 and 6.
- Difference = 90 – 6 = 84.
- Therefore, the difference between ninety and six is “eighty-four.”
Q5. If you have ninety-five marbles and you lose eleven, how many do you have left?
- Remaining = 95 – 11 = 84.
- Hence, the number of marbles left after losing eleven from ninety-five is “eighty-four.”
75 to 90 Numbers in Words
Below is a table that shows the numbers from 75 to 90 in words, helping you to familiarize yourself with their correct spellings and usage.
| Numbers | In Words |
| 75 | Seventy-Five |
| 76 | Seventy-Six |
| 77 | Seventy-Seven |
| 78 | Seventy-Eight |
| 79 | Seventy-Nine |
| 80 | Eighty |
| 81 | Eighty-One |
| 82 | Eighty-Two |
| 83 | Eighty-Three |
| 84 | Eighty-Four |
| 85 | Eighty-Five |
| 86 | Eighty-Six |
| 87 | Eighty-Seven |
| 88 | Eighty-Eight |
| 89 | Eighty-Nine |
| 90 | Ninety |
FAQs
The factors of 84 are 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, and 84.
84 is a composite number because it has more than two distinct positive divisors. It is divisible evenly by numbers other than 1 and itself.
The prime factorization of 84 is 22×3×72^2 \times 3 \times 722×3×7.
84 in words is written as “eighty-four.”
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