Others Maths Puzzle

Present exchange value of doller is=₹60
2 years ago it was ₹45
find out the exchange rate per annum

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Others Other Question

How many words with or without meaning, can be formed by using all the letters of the word, ‘DELHI’, using each letter exactly once?

a. 10
b. 25
c. 60
d. 120 . A sum at simple interest at 13 ½ % per annum amounts to Rs.2502.50 after 4 years. Find the sum.