Question

The post office has stamps of Rs 1, Rs 3 and Rs 7. Which of the following totals cannot be
achieved by buying exactly 100 stamps?
1) Rs 298
2) Rs 600
37 Rs 473
4) Rs 440



simple odd plus odd is always even so 473 is an odd number . Hence it cannot be achieved by buying exactly 100 stamps.

answer :473​

Answer 1

Answer:

you gave the question along with the answer but whyyyyyy????

Answer 2

Answer:

473

Explanation:

1,3,7 are odd values which are supposed to be added 100 times which is even number of times. The rule says addition of even number of odd values will give a Sum which would be even. In the given options 473 is an odd Sum hence 473 cannot be achieved by adding 1,3,7(odd values) 100(even) times