Question

(a) Give at least four examples of counting systems of people in old days.
(b) What do you mean by the 'base' of numbers?
(c)Are the systems 'Counting' and 'numeration' same or different?
(d) Give some examples of word numerals that were used in different parts of the world from History of Mathematics.​

Answer 1

Answer:

When there is a decrease of 5 km/hr in the usual uniform speed of a goods train, due to track repair work

going on it takes 4 hours more than the usual time for travelling the distance of 400 km. Find the usual speed of

the train.

Step-by-step explanation:

When there is a decrease of 5 km/hr in the usual uniform speed of a goods train, due to track repair work

going on it takes 4 hours more than the usual time for travelling the distance of 400 km. Find the usual speed of

the train.

Answer 2

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• Ancient people of different civilizations wrote their numbers in different way. For example, the ancient Egyptians used a lotus flower picture to represent the number 1,000 whereas two lotus flowers represent 2,000.