If 2q35 = 778, find q
A
2
B
1
C
4
D
O
Verified Correct Answer: A.
Step-by-Step Mathematical Solution
2q35 = 778
2 x 52 + q x 51 + 3 x 50 = 7 x 81 + 7 x 80
2 x 25 + q x 5 + 3 x 1 = 7 x 8 + 7 x 1
50 + 5q + 3 = 56 + 7
5q = 63 - 53
q = \(\frac{10}{5}\)
q = 2
Source: Myschool Past Questions Archive (Record #27410)