Question

The unit digit of the cube root of 540
a) 0
b) 1
c) 2
d) 3

Answer 1

Answer:

0 is the answer

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Answer 2

Correct Question :- The unit digit of the cube root of 540 * 50 will be :-

a) 0

b) 1

c) 2

d) 3

Solution :-

→ 540 * 50 = 27000 .

now, we know that, the unit place of the cube of a number depends on the cube of unit digit of that number.

so,

→ 1³ = 1 => unit digit 1 .

→ 2³ = 8 => unit digit 8 .

→ 3³ = 27 => unit digit 7 .

→ 4³ = 64 => unit digit 4 .

→ 5³ = 125 => unit digit 5 .

→ 6³ = 216 => unit digit 6 .

→ 7³ = 343 => unit digit 3 .

→ 8³ = 512 => unit digit 2 .

→ 9³ = 729 => unit digit 9 .

→ 10³ = 1000 => unit digit 0 .

we have to find unit digit of 27000 .

• 27000 = unit digit = 0 => unit digit of cube root also equal to 0. { 10³ = 1000 .}

therefore, we can conclude that, unit digit of cube root of (540 * 50) will equal to zero.

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