What is The Number 85?

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Grade Level:

Pre-School – Class 2

All domains without exception

Definition

What is it?

The number 85 is a two-digit number that comes after 84 and before 86. It represents a quantity of eighty-five items. In mathematics, it's an integer and a natural number.

Simple Example

Quick Example

Imagine you have 85 cricket balls. That's a lot of balls! Or, if your favourite cricketer scored 85 runs in a match, that's a great score, but just short of a century (100 runs).

Worked Example

Step-by-Step

Let's say you want to buy 85 laddoos for a party. You go to the shop and see laddoos packed in boxes of 10. How many full boxes will you need, and how many extra laddoos will you need?

Step 1: Divide 85 by 10 to find out how many full boxes of 10 laddoos you can get. 85 / 10 = 8 with a remainder of 5.
---Step 2: The '8' tells us you will get 8 full boxes, each containing 10 laddoos.
---Step 3: The '5' is the remainder, meaning you will need 5 more laddoos that are not in a full box.
---Step 4: So, you will need 8 boxes of 10 laddoos and 5 individual laddoos to get a total of 85 laddoos.

Answer: 8 full boxes and 5 extra laddoos.

Why It Matters

Understanding numbers like 85 is fundamental to counting, measuring, and calculating in daily life. From managing your pocket money to understanding scores in a game, numbers are everywhere. Careers in finance, engineering, and even sports analytics rely heavily on understanding and working with numbers.

Common Mistakes

MISTAKE: Confusing the place value of 8 and 5, thinking 85 is 8 + 5. | CORRECTION: 85 means 8 tens and 5 ones, which is 80 + 5. The '8' is in the tens place, and the '5' is in the ones place.

MISTAKE: Writing 85 as 'eighty-five' but thinking it's 'eighty and five'. | CORRECTION: While it is eighty and five, the correct way to write it in words is 'eighty-five', as one single number name.

MISTAKE: Forgetting that 85 is an odd number. | CORRECTION: A number is odd if its last digit (the ones place) is 1, 3, 5, 7, or 9. Since 85 ends in 5, it is an odd number.

Practice Questions

Try It Yourself

QUESTION: If you have 85 rupees and you spend 5 rupees, how much money do you have left? | ANSWER: 80 rupees

QUESTION: Your mobile data plan gives you 10 GB of data every day. If you use 85 GB in total, for how many full days did you use the data? | ANSWER: 8 full days (85 divided by 10 is 8 with a remainder of 5)

QUESTION: An auto-rickshaw charges 10 rupees for the first kilometer and 5 rupees for every kilometer after that. If you paid 85 rupees for a ride, how many total kilometers did you travel? | ANSWER: 16 kilometers (85 - 10 = 75; 75 / 5 = 15; 15 + 1 = 16 km)

MCQ

Quick Quiz

Which of the following describes the number 85?

It is an even number.

It is made up of 8 tens and 5 ones.

It comes after 86.

It is a single-digit number.

The Correct Answer Is:

The correct option is B because 85 has 8 in the tens place (8 x 10 = 80) and 5 in the ones place (5 x 1 = 5), so 80 + 5 = 85. It is an odd number, comes before 86, and is a two-digit number.

Real World Connection

In the Real World

You often see the number 85 in everyday life. For example, a discount of 'up to 85% off' during a festive sale means you can save a lot! Or, if your school marks for a subject are 85 out of 100, it's a very good score, showing excellent performance.

Key Vocabulary

Key Terms

PLACE VALUE: The value of a digit based on its position in a number | ODD NUMBER: A whole number that cannot be divided exactly by 2 | TENS PLACE: The second digit from the right in a whole number, representing groups of ten | ONES PLACE: The first digit from the right in a whole number, representing single units

What's Next

What to Learn Next

Now that you understand what the number 85 is, you can explore other two-digit numbers and how they relate to each other. Next, try learning about 'Comparing Numbers' to see how 85 stacks up against other numbers!