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Find the number which is divisible …

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Find the number which is divisible by 11

Posted by Ritika Ritika 5 years, 3 months ago

CBSE > Class 10 > Mathematics

2 answers

Roshni Jaswani 5 years, 3 months ago

Find the square root of the following number by using their ones and tens digit ?(b) 1444 ,(c)3025 (d)4761

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Gaurav Seth 5 years, 3 months ago

Test for divisibility by 11. Take the alternating sum of the digits in the number, read from left to right. If that is divisible by 11, so is the original number.

So, for instance, 2728 has alternating sum of digits 2 – 7 + 2 – 8 = -11. Since -11 is divisible by 11, so is 2728.

Similarly, for 31415, the alternating sum of digits is 3 – 1 + 4 – 1 + 5 = 10. This is not divisible by 11, so neither is 31415.

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CBSE > Class 10 > Mathematics

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CBSE > Class 10 > Mathematics

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CBSE > Class 10 > Mathematics