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How do you multiply a number by 5 when the number is odd?
  • a)
    Divide the number by 2 and add 2.
  • b)
    Subtract 1 from the number, then divide by 2.
  • c)
    Divide the number by 3.
  • d)
    Multiply the number by 10 and then divide by 2.
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
How do you multiply a number by 5 when the number is odd?a)Divide the ...
Explanation:
To multiply a number by 5 when the number is odd, we can follow the given steps:

Step 1: Subtract 1 from the number
When we subtract 1 from any odd number, we get an even number. For example, if the given number is 7, subtracting 1 gives us 6.

Step 2: Divide the result by 2
After subtracting 1, we divide the result by 2. In the previous example, dividing 6 by 2 gives us 3.

Step 3: Final result
The final result is the number obtained after dividing by 2 in step 2. In our example, 3 is the final result.

Explanation in detail:
Let's take an example to understand this concept further. Suppose we have an odd number, let's say 9, and we want to multiply it by 5.

Step 1: Subtract 1 from the number
9 - 1 = 8

Step 2: Divide the result by 2
8 ÷ 2 = 4

Step 3: Final result
The final result is the number obtained after dividing by 2 in step 2, which is 4 in our example.

Verification:
To verify if the final result is correct, we can multiply it by 5 and check if it matches the original odd number.

4 × 5 = 20

The original odd number was 9, and after following the steps, we obtained 20, which is indeed 9 multiplied by 5.

Conclusion:
To multiply a number by 5 when the number is odd, we can subtract 1 from the number and then divide the result by 2. This method ensures that we obtain the correct result without directly multiplying the odd number by 5.
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Community Answer
How do you multiply a number by 5 when the number is odd?a)Divide the ...
To multiply a number by 5 when the number is odd, first subtract 1 from the number, and then divide the result by 2. The ones digit will always be 5. For example, to multiply 7 by 5, subtract 1 to get 6, then divide by 2 to get 3, and the answer is 35.
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Directions: Study the following information carefully and answer the questions given below.In a certain code language,The consonants up to M are coded with the first four even numbers i.e., B = 2, C = 4 and so on (After 8, start the numbering from 2 again). The consonants from N to Z are coded with the first five odd numbers i.e., N = 1, P = 3 and so on (After 9, start the numbering from 1 again). The vowels A, E, I, O and U are coded as &, @, #, % and $ respectively.The codes are written from the left end to the right end. If two or more condition is applicable, then consider all the conditions.Condition 1: If the first and the last letters are vowels, then the code for each vowel is changed to the code for the immediate next vowel. (For example: ATTENTIVE - @11#11%3#)Condition 2: If the second letter of the word is a vowel, then the code of that vowel is changed to the corresponding code and the remaining vowels will be coded as ‘^’. (For example: CONFIDENCE – 4^6^14^)Condition 3: If the first three letters of the word is a consonant, then all the consonants of the word will be coded as the code for the letter which appears second succeeding letter in the alphabetical series. (i.e., the code for ‘B’ is the code for ‘D’ and the code for ‘C’ is the code for ‘E’ and so on, after Z start with A again)Condition 4: If the first and the last letters are consonants, then the code for both the consonants are to be interchanged and the rest of the consonants are coded as the code for the immediate previous letter in the alphabetical series. (For example, the code for ‘B’ will be coded with the code for ‘A’ and so on, before A start with Z again).Condition 5: If in the word, none of the above conditions follow, then all the letters are coded as the corresponding code and then reverse the entire code.Note:1. If conditions 2 or 3 and 1 follows, then give first priority to condition 1 and then condition 2 or 3.2. If conditions 2 or 3 and 4 follows, then give first priority to condition 4 and then condition 2 or 3.3. If more than two conditions follow between conditions 1 to 4, then all the conditions are proceeded in the ascending order i.e., from 1 to 4.Q. How can the word ‘IRREGULAR CONSCIENCE’ be coded as per the conditions?

Directions: Study the following information carefully and answer the questions given below.In a certain code language,The consonants up to M are coded with the first four even numbers i.e., B = 2, C = 4 and so on (After 8, start the numbering from 2 again). The consonants from N to Z are coded with the first five odd numbers i.e., N = 1, P = 3 and so on (After 9, start the numbering from 1 again). The vowels A, E, I, O and U are coded as &, @, #, % and $ respectively.The codes are written from the left end to the right end. If two or more condition is applicable, then consider all the conditions.Condition 1: If the first and the last letters are vowels, then the code for each vowel is changed to the code for the immediate next vowel. (For example: ATTENTIVE - @11#11%3#)Condition 2: If the second letter of the word is a vowel, then the code of that vowel is changed to the corresponding code and the remaining vowels will be coded as ‘^’. (For example: CONFIDENCE – 4^6^14^)Condition 3: If the first three letters of the word is a consonant, then all the consonants of the word will be coded as the code for the letter which appears second succeeding letter in the alphabetical series. (i.e., the code for ‘B’ is the code for ‘D’ and the code for ‘C’ is the code for ‘E’ and so on, after Z start with A again)Condition 4: If the first and the last letters are consonants, then the code for both the consonants are to be interchanged and the rest of the consonants are coded as the code for the immediate previous letter in the alphabetical series. (For example, the code for ‘B’ will be coded with the code for ‘A’ and so on, before A start with Z again).Condition 5: If in the word, none of the above conditions follow, then all the letters are coded as the corresponding code and then reverse the entire code.Note:1. If conditions 2 or 3 and 1 follows, then give first priority to condition 1 and then condition 2 or 3.2. If conditions 2 or 3 and 4 follows, then give first priority to condition 4 and then condition 2 or 3.3. If more than two conditions follow between conditions 1 to 4, then all the conditions are proceeded in the ascending order i.e., from 1 to 4.Q. What is the code for the phrase ‘TECHNICAL ANALYSIS’ using the given conditions?

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How do you multiply a number by 5 when the number is odd?a)Divide the number by 2 and add 2.b)Subtract 1 from the number, then divide by 2.c)Divide the number by 3.d)Multiply the number by 10 and then divide by 2.Correct answer is option 'B'. Can you explain this answer?
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