1.

612 589 743 468 297 If the position. of the second and the third digits of each of the numbers are· interchanged, in how many numbers thus formed will the last digit be a perfectsquare? (' l' is also a perfect square

Answer»

One
Two
Three
Four

Solution :`612 RARR , 621,589 rArr 589 rArr 598 : `
`743 rArr 734, 468 rArr 486 ,`
`297 rArr 279`


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