Question
Which of the following numbers is divisible by
11?Solution
A number is divisible by 11 when difference between sum of digits at even place and sum of digits at odd place is either 0 or 11. 4352864: Difference = (4 + 5 + 8 + 4) - (3 + 2 + 6) = 10 2859246: Difference = (8 + 9 + 4) - (2 + 5 + 2 + 6) = 6 1928573: Difference = (9 + 8 + 7) - (1 + 2 + 5 + 3) = 13 3567245: Difference = (3 + 6 + 2 + 5) - (5 + 7 + 4) = 0 So, 3567245 is divisible by 11.
ABC is an isosceles triangle where AB = AC which is circumscribed about a circle. If P is the point where the circle touches the side BC, then which of ...
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