Problems based on Numbers Test 3

Question : 2 of 40

Marks: +1, -0

In a 4-digit number, a 381 is divisible by 11. What is the value of a?

Solution:

Let the 4 digits number = a 381
By divisibility test of 11,
Sum of odd terms - sum of even terms = 11

(a+8)-(3+1)=11

a+8-4=11

a+4=11

a=11-4=7

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