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What is the value of expression $315 − 710$ ?

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312

512

212

answer is C.

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Detailed Solution

Given expression is

315 − 710

.
Now, simplifying

⇒ 3 × 5 + 1 5 − 710 = 165 − 710

Since the denominators of the above expression are different, we need to take the LCM of the denominators.
Therefore, the L.C.M of numbers 5 and 10

= 10

.
Thus,

⇒ 16 × 2 5 × 2 = 3210

7 × 1 10 × 1 = 710

So,

= 3210 − 710 = 32 − 7 10 = 2510 = 52

= 212

Therefore, the value of expression

315 − 710

. Hence, option (3) is correct.

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