A number consists of two digits. If the digits in the unit's place and the ten's place are 7 and x respectively, the number is ---


A) x + 7

B) 10 ( x + 7 )

C) 70 + x

D) 10x + 7

Correct Answer:
D) 10x + 7

Description for Correct answer:
Unit place = 7

Tens place = 10

Hence, the number is 10x + 7.

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