Math Problem Statement

When a number is divided by 893 the remainder is 193. If the same number

is divided by 47, the remainder will be :

Solution

Let the number be denoted by NN. According to the problem, when NN is divided by 893, the remainder is 193. This can be written as:

N=893k+193N = 893k + 193 for some integer kk.

Now, we need to find the remainder when NN is divided by 47. Substituting N=893k+193N = 893k + 193 into this, we get:

Nmod47=(893k+193)mod47N \mod 47 = (893k + 193) \mod 47

Using the property of mod, we can split this expression as:

Nmod47=(893kmod47+193mod47)N \mod 47 = (893k \mod 47 + 193 \mod 47)

Step 1: Calculate 893mod47893 \mod 47

We can now divide 893 by 47 to get the remainder:

893÷47=19 with a remainder of 0893 \div 47 = 19 \text{ with a remainder of } 0

Thus,

893mod47=0893 \mod 47 = 0

Step 2: Calculate 193mod47193 \mod 47

Now, divide 193 by 47:

193÷47=4 with a remainder of 5193 \div 47 = 4 \text{ with a remainder of } 5

Thus,

193mod47=5193 \mod 47 = 5

Final Calculation

Now we substitute back:

Nmod47=(0+5)=5N \mod 47 = (0 + 5) = 5

So, the remainder when NN is divided by 47 is 5\boxed{5}.


Would you like further clarification on this? Here are some related questions:

  1. How is the modulus operation applied in division?
  2. Can we use the same approach for larger divisors?
  3. What happens if the remainder in a division is negative?
  4. How would this change if the remainder when dividing by 893 was different?
  5. How can you calculate the remainder when dividing large numbers quickly?

Tip: The modulus operation is often used in number theory to manage remainders and cycles, especially when working with congruences.

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Math Problem Analysis

Mathematical Concepts

Modulus operation
Number theory
Division algorithm

Formulas

N = 893k + 193
N mod 47 = (893k mod 47 + 193 mod 47)

Theorems

Division algorithm
Modular arithmetic

Suitable Grade Level

Grades 9-11