Number System
Radha's present age is three years less than twice her age 12 years ago. Also the respective ratio between Raj's present age and Radha's present age is 4 : 9. What will be Raj's age after 5 years ?

15 years
14 years
16 years
17 years

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Number System
The sum of the ages of a son and father is 65 years. After 5 years the age of father will be double of the age of son. What is the age of son ?

20 years
18 years
17 years
19 years

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Number System
If the letters of the word PREVIOUS be arranged at random, what is the probability that all the vowels come together ?

1/14
1/12
1/10
1/16

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