Question

: ________ is equivalent to ten lakh in the international system of numeration.
(a) Hundred thousand
(b) Ten million
(c) One million
(d) Ten thousand

Answer 1

Hint: Compare the Indian number system with the international number system to detect the difference in counting and the basic difference or similarity between them. Write the positions of ten lakh in the Indian number system and similarly find the same place value in the international system to determine the answer.

Complete step by step answer:
The number system or the numeral system is the system of naming or representing numbers. There are two types of number systems namely the Indian number system and the International number system. The main difference between the Indian number system and the International number system is the placement of the separators. In the International number system, millions are written after thousands. In the Indian system, lakhs are written after a thousand. The place of a digit is defined by its position. Millions and billions are used in the international number system whereas lakhs and crores are used in the Indian number system. Up to ten thousand both Indian and international number systems are the same.
Now, in Indian system one lakh appears after ten thousand while in the international system hundred thousand appears. Next is ten lakhs in the Indian system, and one million in the international system. Therefore, we can conclude that one million is equivalent to ten lakh in the international system of numeration.
Hence, option (c) is the correct answer.

Note:
 Don’t get confused by the commas or separators used in both the Indian number system and the international number system. Indian number system uses a comma after every two place values after the hundredth digit, while the international number system uses a comma after every three place values. We can also solve the question by comparing the number of 0’s present in the numbers given in the options with the number of 0’s present in ten lakh.