MBA Exam

In a book store, the words of the glowsign board "MODERN BOOK STORES" are individually flashed after 5/2, 17/4 and 41/8 seconds respectively. Each word is put off after a second. What is the least time after which full name of the book store can be read?

1) 68.2 seconds
2) 79.4 seconds
3) 73.5 seconds
4) None of these

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MBA Other Question
The largest number amongst the following that will perfectly divide (101^100)-1 is..

1) 100
2) 10,000
3) 100,000
4) 100^100
 how many different remainders can result when 100th power of a natural number is divided by 125?

1) 2
2) 3
3) 5
4) 1