The decimal expansion of the rational number:

The decimal expansion of the rational number 33/2²×5 will terminate after

(a) One decimal place

(b) Two decimal places

(c) Three decimal places

(d) Four decimal places

Solution:

(b) Two decimal places.

33/2²×5 = 33×5/2²×5² = 33×5/10² – 33×5/100

Since no. of zeros is 2.

√10×√15 is equal to

(a) 6√5

(b) 5√6

(c) √25

(d) 10√5

Solution:

(b) 5√6 is correct

Hint: √10 × √15

= √2 × √5 × √3 × √5

= 5 × √6

= 5√6

More Solutions:

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