Question : Directions: If 0, 1, 2, 3,....., 9 is written as a, b, c, d, ....j, then find dc × f – (bf – d) × d.
Option 1: bcf
Option 2: abe
Option 3: abb
Option 4: bce
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Correct Answer: bce
Solution :
Given:
0, 1, 2, 3,....., 9 is written as a, b, c, d, ....j
dc × f – (bf – d) × d = ?
The equation is –
32 × 5 – (15 – 3) × 3
= 160 – 12 × 3
= 160 – 36
= 124→bce
So, after solving the equation the answer is bce. Hence, the fourth option is correct.
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