40A + 63B = 521. What is the value of A and B?
Question and options
40A + 63B = 521. What is the value of A and B?
- A=6, B=3
- A=3, B=6
- A=2, B=7
- A=7, B=2
Answer and explanation
Correct answer: C - A=2, B=7
Check: 40x2 + 63x7 = 80 + 441 = 521. The other pairs give 429, 498 and 406. So A=2, B=7.
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CUSAT CAT Integrated IPR Ph.D.
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