Question:
If A3 + 8B = 150, then the value of A + B is
(a) 13
(b) 12
(c) 17
(d) 15
Solution:
(a) We have, A3+ 8B = 150
Here, 3 + B = 0, so 3 + B is a two-digit number whose unit’s digit is zero.
.-. 3+B = 10=>B = 7
: Now, considering ten’s column, A+ 8 + 1 = 15
= A + 9 = 15
=> A = 6
Hence, A+B=6+7 = 13
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