| Some 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\[39\times 22=?\] |
A) 27
B) 51
C) 31
D) 21
Correct Answer: C
Solution :
[c] \[72\times 19=23\Rightarrow (7\times 2+1\times 9=23)\] \[13\times 48=35\Rightarrow (1\times 3+4\times 8=35)\] \[16\times 43=18\Rightarrow (1\times 6+4\times 3=18)\] \[So,\,\,39\times 22=?\Rightarrow (3\times 9+2\times 2=31)\]
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