MBA Exam Numerical Ability Percentage

For a family,the savings per month are 30% of the total income.if the expenditure on education is increased from 30% to 40% of the total income,then find the savings,as a percentage of the expenditure on education,provided there is no change in the savings?pl. provide sol.

1) 133 1/3%
2) 75%
3) 100%
4) cannot be determined

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MBA Other Question
When I left home for office on a particular day my father’s watch showed 7:00 PM, and when I reached my office my watch showed 7:50 PM. Next day in the morning when my father’s watch showed 6:00 AM, my watch showed 7:30 AM. If my father’s watch runs at normal speed and my watch gains 5 minutes per hour, then the time taken by me to reach my office from home, on that day, was closest to

1) 15 minutes
2) 13 minutes 38 seconds
3) 13 minutes 50 seconds
4) 14 minutes 50 seconds
 Let I be the set of natural numbers such that each element in I(i) is a three digit number which leaves a remainder of 2 when divided by 4.(ii) is divisible by 11 but not by 13.How many elements belong to I?
p.s. share your explaination as well

1) 17
2) 15
3) 13
4) 19
5) none of these