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If 6***5=31,7***8=57,3***4=13, then 9***...

If `6***5=31,7***8=57,3***4=13`, then `9***10=?`

A

90

B

91

C

81

D

19

Text Solution

Verified by Experts

The correct Answer is:
B
As, `6***5=6xx5+1=31`
`7***8=7xx8+1=57`
and `3***4=3xx4+1=13`
Similarly, `9***10=9xx10+1=91`
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ARIHANT PUBLICATION-MATHEMATICAL OPERATIONS AND SYMBOL NOTATIONS-Let us Practice (A. Base Level Exercise )
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