A complete factorization of  is

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• 
• 
• 

D.

              

    

A man loses  of his money and after spending 80% of the remainder, he is left with ₹ 159. How much did he have at first?

• ₹ 500

• ₹ 800

• ₹ 1000

• ₹ 1200

Among below expressions which one can be expressed as the difference of two cubic expressions?

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• 
• 
• 

D.

Find the sum of:

• n

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• (n + 1)

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B.

For two positive numbers a and b, if a² + b² = 24 and ab = 6, then (a³ + b³) is equal to

• 96

• 10

• 102

• 108

D.

108

a² + b² = 24  and ab = 6