Math, asked by nehasharma0039, 1 year ago

in 439*71, replace * by the smallest digit to make it divisible by 11

Answers

Answered by add1
28
*=5

as 4+9+7=20

and 3+*+1 should be 9

:.*=5

20-9=11


nehasharma0039: how 3+*+1 should be 9?
nehasharma0039: the answer 5 is right but I can't find the concept behind it
add1: the divisiblity test is that difference of sum of alternate digits should be 0 or 11
Answered by amarendrabaliarsingh
2

Answer:

replace×by the smallest digit to make the following divisible by 3

387

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