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A counter shows 99,99,990 and rises by 4 each tick. After how many ticks does it first show an 8-digit number?

A2
B4
C3
D10
Answer & Solution
Correct answer: C. 3
After 2 ticks it shows 99,99,998, still 7 digits, and after 3 ticks it shows 1,00,00,002.
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