Number System
What is a two-digit number if the ratio of the digit at ten's place to the digit at unit's place is 4 : 3 ? (I) The sum of the digits of a two-digit number is 14. (II) The digit at unit place is 75% o

If the data even in both statements (I) and (II) together is not sufficient to answer the question.
If the data in statement (II) alone is sufficient to answer the question, while that in statement (I) alone is not sufficient.
If the data either in statement (I) alone or in statement (II) alone is sufficient to answer the question.
If the data in statement (I) alone is sufficient to answer the question while that in statement (II) alone is not sufficient.

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Number System
In a 150-litre mixture of milk and water, the percentage of milk is 84%. How much water should be added so that the percentage of milk becomes 52.5% ?

80 litre
95 litre
85 litre
90 litre

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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
36
98

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