Number System
A laborer is engaged for 30 days on the condition that he receives Rs.25 for each day he works and is fined Rs.7.50 for each day is absent. He gets Rs.425 in all. For how many days was he absent?

Number System
The sum of the digits of a two-digit number is 15 and the difference between the digits is 3. What is the two-digit number?

69
96
Cannot be determined
78

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Number System
Letters of the word SERIES are arranged in such a way that all the vowels always come together. What is the total number of ways of making such an arrangement ?

72
112
98
36

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