Write a digit in the blank space of each of the following numbers so
that the number formed is divisible by 11:
a)12__98315 b) 72___483
Answers
Answer:
56789965532213678990
Given : a)12__98315 b) 72___483
To Find : digit in the blank space of each so that the number formed is divisible by 11:
Solution:
Divisibility rule for 11
The Divisibility Rule of Eleven is that you must subtract and then add the digits in an alternating pattern from left to right
and resultant should be divisible by 11
12__98315
1 - 2 + x - 9 + 8 - 3 + 1 - 5
10 + x - 19
= x - 9
x = 9 => 9 - 9 = 0 is divisible by 11
Hence 12998315
Hence 9 will come in blank space
72___483
7 - 2 + y - 4 + 8 - 3
= 6 + y
Hence y must be 5
5 will come in blank space
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