# Maths: Rounding – the ultimate challenge!

Right Year 5, we’ll be very impressed if anyone can solve this.

When a number is rounded to the nearest 100,000 it is 300,000.

When it is rounded to the nearest 10,000 it is 340,000.

What could the number be?

Don’t forget – there may be more than one answer.

Good luck!

### 20 thoughts on “Maths: Rounding – the ultimate challenge!”

• 14th October 2020 at 6:45 pm

It could be 341,000 and 342,000 and 343,000 and 344,000

Done that is all I would think of

• 20th October 2020 at 4:08 pm

Well investigated Mia.

Is 344,000 the highest number that it could be?

• 14th October 2020 at 8:21 pm

It could be any number under 345,000.

The answer could be 340,000 ,341,000, 342,00, 343,000, 344,000.

• 20th October 2020 at 4:09 pm

Well investigated Jayden.

Is 340,000 the lowest number that it could be?

• 14th October 2020 at 8:30 pm

It could be under the number 345,000.

And the answer is 341,000, 342,000, 343,000, 344,000

• 20th October 2020 at 4:10 pm

Well investigated Zip.

Is this the only number that it could be?

• 15th October 2020 at 2:50 pm

Th number can be from 335000 to 449000

• 15th October 2020 at 2:51 pm

Th number can be 335000-449000

• 20th October 2020 at 4:12 pm

Well investigated Franek.

Does 449,000 round to 340,000 when rounded to the nearest ten?

• 15th October 2020 at 2:55 pm

hi i love these lessons and thank you

• 20th October 2020 at 4:12 pm

Hi Jake.

Have you solved this one yet?

Mr Bushell

• 15th October 2020 at 2:59 pm

335,000 up to 349,999

• 20th October 2020 at 4:13 pm

Well investigated boys.

What is 349,999 when rounded to the nearest 10?

• 15th October 2020 at 3:00 pm

it must be 405 i am not queit sure

• 20th October 2020 at 4:14 pm

Well investigated Amelia.

Think about the place value of the numbers involved. How many digits do they have?

• 15th October 2020 at 9:03 pm

335,000
337,000
340,856
343,009
More than 9,900 ways.

• 20th October 2020 at 4:15 pm

Well investigated Hargun. Did you not fancy writing down all 9,900 ways?

How do you know there are 9,900? What is the lowest and highest possibility?

• 16th October 2020 at 4:47 pm

. the first one no because if it is 100,000 and it is 4 and bellow it would round to 100,000. But if it is 5 and more it would round to 200,000 so it would not round to 300,000.