Number System
In how many different ways can be the letters of the word PENCIL be arranged among themselves ?

720
860
640
510

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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 ?

14 years
17 years
16 years
15 years

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