Number puzzle?
If I round my number to the nearest hundred, I get 500.
My number has twice as many tens as hundreds and 8 ones.
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The last digit is already clear by the 8 one. In order to give a fully hundreds of rounded number 500, the hundreds can only be 4 or 5. Since the tenth digit is to be twice as high, it can only be the 4 and thus 2*4=8 for the tenth digit, i.e. 488.
If your number is 500 rounded to hundreds, this means that it is between 450 and 549. Since the hundreds’s position can be 4 or 5 and is given that the number has twice as many tens as hundreds, the hundreds’s position must be number 4 because otherwise the ten’s position would exceed 10.
This is the hundreds of places 4. The ten place is thus 2×4=8 and the one is given=8.
This is the number 488.
This must then be a number between 450 and 549, since it is round to 500.
If there are twice as many tens as hundreds, it can be only 8 tens and 4 hundreds. So the number would be 488.