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  1. The sum of the cubes of the numbers 22, –15 and –7 is equal to
    1. 6930
    2. 9630
    3. 3
    4. 0
Correct Option: A

Here, 22 – 15 – 7 = 0
We know that
a3 + b3 + c3 = 3abc,
if a + b + c = 0
∴  (22)3 + (–15)3 + (–7)3
= 3 × 22 × (–15) (–7) = 6930


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