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(a) 5335/11= 485

(b) 920814/11=820074

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um she/he asked to test the divisibility not to divide the number by 11
sry didn't see the question properly
its ok it happens some times
(a)  sum of 1st alternative numbers numbers =5+3=8
      sum of 2nd pair of alternative numbers =3+5=8
difference between the the 2 pairs =0
therefore the number 5335 is divisible by 11

(b) sum of first pair of alternative numbers =9+2+8+4=23
      sum of second pair of alternative numbers= 0+0+1=1
as 22 is divisible by 11 therefore the number 9020814 is divisible by 11
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