Necessary condition to apply the Chinese remainder theorem is modulo of congruence should be:

Necessary condition to apply the Chinese remainder theorem is modulo of congruence should be: Correct Answer Relatively prime

Concept:

Chinese remainder theorem (CRT): Chinese remainder theorem is a method to solve a system of simultaneous congruence. One most important condition to apply CRT is the modulo of congruence should be relatively prime.

For example, consider simultaneous congruence relation

x ≡ a1 (mod m1),

x ≡ a2 (mod m2)

To apply CRT, m1 and m2 must be relatively prime.

Modulo of congruence: If two number a and b gives the same remainder when divided by m or difference 'a - b' is completely divisible by m, then m will be modulo of a and b.

Explanation:

As discussed above, we can say that the modulo of congruences should be relatively prime.

Related Questions

The question given below consists of a statement, followed by three arguments numbered I, II and III. You have to decide which of the arguments is/are ‘strong’ arguments and which is/are ‘weak’ arguments and accordingly choose your answer from the alternatives given below each question. Statement: As a trade war looms, one of Chinese President Xi Jinping’s biggest weapons could be boycotts of American brands by his country’s legion of consumers. But Xi would also be risking collateral damage at home, The China operations of all-American brands ranging from Coca-Cola Co. and McDonald’s Corp. to Walt Disney Co. are co-owned by state-backed Chinese firms.  Which among the following arguments support the above statement in the best possible manner? Arguments: I. One of Coke’s main China partners is government-backed COFCO Corp., Shanghai Disneyland is part owned by a local consortium, and McDonald’s franchisee in the country is controlled by state-backed conglomerate Citic Ltd. and private-equity firm Citic Capital Holdings.  II. Even when Chinese companies don’t have direct ownership links with U.S. brands, boycotts or other non-tariff retaliation would hit the local partners of those American companies. III. The number of big clean wins in terms of striking against the other guy (American brands) - without accidentally punching your own guy (Chinese firms) in the face - is extremely large.
Choose the linear congruence which has exactly 3 solution modulo 3