Number System
In a two-digit number, if it is known that its unit's digit exceeds its ten's digit by 2 and that the product of the given number and the sum of its digits is equal to 144, then the number is:

24
26
46
42

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Number System
In how many different ways can 7 boys and 3 girls sit in a row such that all the three girls do not sit together ?

3286880
3086880
3186880
3386880

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Number System
A man engaged a servant on the condition that he would pay him Rs.900 and a uniform after one year service. He served only for 9 months and received uniform and Rs.650, find the price of the uniform?

Rs.100
Rs.90
Rs.85
Rs.80

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