यदि `4**2=3` और `8**4=3` तो `21**7=?`

Options

A. 4
B. 3
C. 8
D. 16

Answer

A

Explanation

`4^(**)2=3rArr(4)/(2)+1=3`
`8^(**)4=3rArr(8)/(4)+1=3`
अतः
`21^(**)7=?rArr(21)/(7)+1=4`