Of the four given equations, the first three are solved on the basis of a certain system. Find the correct answer for the unsolved fourth equation on the same basis.
6 x 5 = 91
8 x 7 = 169
10 x 7 = 211
22 x 5 = ?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e 331.
| Understanding | Application |
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Given: 6 x 5 = 91 ⇒(6 x 5) x 3 + 1 = 91 8 x 7 = 169 ⇒(8 x 7) x 3 + 1 = 169 10 x 7 = 211 ⇒(10 x 7) x 3 + 1 = 211 |
Similarly, 22 x 5 = ? ⇒(22 x 5) x 3 + 1 = 331 Hence, option 2 is the correct answer. |