यदि `4xx9xx3=4`तथा `5xx3xx1=3` है , तो
`9xx9xx7=?`

Options

A. 5
B. 6
C. 7
D. 9

Answer

A

Explanation

`4 xx 9 xx 3 = 4`
`rArr sqrt(4+9+3) = 4`
`rArrsqrt16 = 4`
`5 xx 3 xx 1 = 3`
`rArr sqrt(5 +3+1) = 3`
`rArr sqrt9 = 3`
अतः ,
`9 xx 9 xx 7 = ?`
`rArr ? = sqrt(9+9+7) `
`rArr ? = sqrt25 = 5`