MBA Exam

If the approximate square root of (a2+b) , when (a>b), is equal to a +b/2a, then what is the approximate square root of 66?

1) 6.3
2) 8.4
3) 6.5
4) 8.125
5) 9.125

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MBA Other Question

A number when added to its sum of digits 2001 is obtained.How many such numbers exists ?Guys this was the question in my CAT 2011 exam.

1) 0
2) 1
3) 2
4) 3
A certain sum of money is made up of Re. 1, 50 paise and 25 paise coins. The ratio of the number of these coins is 2.5 : 3 : 4. Then, 3/5th of the Re. 1 coins are changed to 50 paise and 25 paise coins, such that the ratio of the total number of these coins in the same order became 1 : 2. Now, half of the 50 paise coins are changed to Re. 1 coins and all the 25 paise coins are changed to Re. 1 and 50 paise coins in the ratio 7: 4. What is the ratio of the Re. 1 and 50 paise coins at the end of the conversions?

1) 11:23
2) 16:13
3) 54:71