Class 10th//Pair of Linear equations with 2 variables.
Help please.
Answers
Answer:
11 (Option B)
Step-by-step explanation:
Let the two-digit number (x & y ) be as in tens and unit digit respectively.
Then the two-digit number is gonna be 10x + y.
So in its reverse form, the number is gonna be 10y + x.
Adding them , we get the sum = S ( sum of two digits) = (10x+ y ) + (10y +x)
---> = 11x + 11y
since 11 is common in both terms, take 11 outside the bracket
= 11(x + y )
Therefore, to make S a square number the least value of ( x + y )
should be 11 so that S = 11x11 i.e. it is a square number
therefore (x + y ) = 11
which is Option B
Answer:
Correct Option is b) 11
Step-by-step explanation:
Let the two digit number has X & Y respectively. Then the number is 10x+y . So, it's reverse number is 10y+x .
Adding , we get the sum = S= ( 10x+y) + (10y+x) => S = 11x+11y=11(x+y)
To make S a square number the atleast should be 11 so that S =11×11 which is a square number I.e,
(x+y)=11 .
Hence, option b is correct.