class 8 mathematics

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Write a 2-digit number ab and the number obtained by reversing its digits i.e., ba. Find their sum. Let the sum be a 3-digit number dad.Find the values of a and d.

#Mathematics #Class VII-X Mathematics

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Ketan Chandak ·2012-02-11 16:31:28

no is 10a+b and reverse is 10b+a....
adding them we get 11a+11b which is equal to 101d+10a

simplifying we get 11b+a=101d...
since b,d and a are both unit digit numbers....d has to be 1...

11b+a=101
and since a is also a single digit no b can only be 9....

therefore a is 2....

the original no ab is 29...
the sum dad is 121....

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anky2930 don ·2012-04-18 03:06:19

you must let the value of a&b then it be solve

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class 8 mathematics

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