Question 30

Same equations have been solved on the basis of certain system. Find the correct answer for the unsolved equations on that basis ?
If $$72 \times 19 = 23, 13 \times 48 = 35$$ and $$16 \times 43 = 18$$ then $$39 \times 22 = ?$$

Solution

For the two digits of the two digit numbers, the pattern followed is : $$(ab\times cd)=(a\times b)+(c\times d)$$

Eg :- $$72\times19=(7\times2)+(1\times9)=14+9=23$$

and $$13\times48=(1\times3)+(4\times8)=3+32=35$$

Similarly, $$39\times22=(3\times9)+(2\times2)=27+4=31$$

=> Ans - (C)

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Same equations have been solved on the basis of certain system. Find the correct answer for the unsolved equations on that basis ?If $$72 \times 19 = 23, 13 \times 48 = 35$$ and $$16 \times 43 = 18$$ then $$39 \times 22 = ?$$