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The number 357 is nearest to the 400 because -
357 is nearest to the hundred for this we have some rules :
step 1 : we rounding the number according to the last two digit .
step 2 : This number is in hundred form not in the thousand form
step 3 : If we round 357 in ten's form the the answer is 360 Because in this case we round last one digit
step 4 : when we round 357 in hundred's form, then the answer is 400 because here we round last two digit and 57 is nearest to the next hundred number (00)
Rules : If the last number in hundred form less 50 then it is rounded in 00 form by already given number otherwise it is round by next hundred number
Note : We always round the Numbers in there nearest numbers
In the above qustion we have 357 - in this case 57 is garter the 50 then it rounded by 400 but if 357 is given here as 339 then it is rounded by 300 because it is less then 50 . In same way round ten's numbers
Final result : 357 is nerest to the 400 in the hundred form that's why the answer for this question is 400