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Test: Multiplication - Class 1 MCQ


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10 Questions MCQ Test Mental Maths - Test: Multiplication

Test: Multiplication for Class 1 2024 is part of Mental Maths preparation. The Test: Multiplication questions and answers have been prepared according to the Class 1 exam syllabus.The Test: Multiplication MCQs are made for Class 1 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Multiplication below.
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Test: Multiplication - Question 1

What is the quickest way to multiply any number by 10?

Detailed Solution for Test: Multiplication - Question 1
The quickest way to multiply any number by 10 is to simply add 0 to that number. For example, if you want to multiply 3 by 10, you can just add 0 to 3, resulting in 30. This trick works because our number system is based on cycles of ten, making it easy to move each digit one place to the left, effectively multiplying by 10.
Test: Multiplication - Question 2

When using the "Amazing Facts of Nine" trick, what does the tens digit of the answer represent?

Detailed Solution for Test: Multiplication - Question 2

The "Amazing Facts of Nine" Trick Explained

The "Amazing Facts of Nine" trick is a fascinating mathematical phenomenon that showcases the unique properties of the number nine in multiplication. When you multiply any number by nine and then sum the digits of the result, you'll invariably come back to nine. This trick also reveals an interesting aspect about the tens digit of the answer, which we'll explore here.

- Understanding the Trick
- When you multiply a number by nine, the product has a special relationship with the original number.
- For example, if you multiply 2 by 9, you get 18. If you multiply 3 by 9, you get 27, and so on.

- The Tens Digit of the Answer
- Upon closely examining the results of multiplying numbers by 9, you'll notice a pattern in the tens digit of the answer.
- The tens digit increases by one as the original number is incremented by one.
- This pattern leads to a common misconception that the tens digit represents "one more than the original number" or "one less than the original number". However, the correct interpretation is more nuanced.

- Correct Interpretation
- The correct answer to the question of what the tens digit represents is: C) The original number.
- This is because the tens digit effectively mirrors the progression of the original number, with a slight adjustment. When multiplying a single-digit number by nine, the tens digit of the product is always one less than the original number, which might seem counterintuitive but follows from how the multiplication works.

- Illustration of the Concept
- Suppose you choose 5 as your original number and multiply it by 9, resulting in 45.
- Here, the tens digit is 4, which is one less than the original number, 5. However, the total sum of the digits (4 + 5) equals 9, demonstrating the unique relationship with nine.
- This pattern holds true for any single-digit number multiplied by 9, resulting in products that, when their digits are summed, equal to 9, and where the tens digit reflects the original number adjusted by one.

- Conclusion
- The "Amazing Facts of Nine" trick encapsulates the intriguing properties of the number nine within the realm of multiplication.
- It reveals a consistent pattern in the tens digit of the product, which, upon initial observation, illustrates the original number in a slightly modified form.
- To delve deeper into this and other mathematical wonders, exploring educational resources like those available on EduRev can provide further insight and enrichment.

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Test: Multiplication - Question 3

What is the shortcut for multiplying a number by 5 when the number is even?

Detailed Solution for Test: Multiplication - Question 3
The shortcut for multiplying a number by 5 when the number is even is to divide the number by 2 to get the tens digit, and the ones digit will always be 0. For example, to multiply 4 by 5, you can divide 4 by 2 to get 2, and the answer is 20.
Test: Multiplication - Question 4
How do you multiply a number by 5 when the number is odd?
Detailed Solution for Test: Multiplication - Question 4
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.
Test: Multiplication - Question 5
What is the pattern for the sum of the digits when you multiply by 3?
Detailed Solution for Test: Multiplication - Question 5
When you multiply by 3, the pattern for the sum of the digits in the answer is always 3, 6, or 9. For example, when you multiply 6 by 3, the sum of the digits in the answer is 18, and 1 + 8 equals 9.
Test: Multiplication - Question 6
Using the shortcut method, what is the product of 50 x 6?
Detailed Solution for Test: Multiplication - Question 6
To find the product of 50 x 6 using the shortcut method, first, multiply the tens digits (5 and 6) to get 30, and then multiply the ones digits (0 and 6) to get 0. Finally, add these two results together: 30 + 0 = 30. So, 50 x 6 = 300.
Test: Multiplication - Question 7
What is the shortcut for multiplying a number by 9?
Detailed Solution for Test: Multiplication - Question 7
The shortcut for multiplying a number by 9 is to first subtract 1 from the number, and then divide the result by 2. For example, to multiply 8 by 9, subtract 1 to get 7, and then divide by 2 to get 3. So, 8 x 9 = 72.
Test: Multiplication - Question 8
Using the chunk method, what is the product of 24 x 7?
Detailed Solution for Test: Multiplication - Question 8
To find the product of 24 x 7 using the chunk method, first, multiply the tens digits (2 and 7) to get 14, and then multiply the ones digits (4 and 7) to get 28. Finally, add these two results together: 14 (tens) + 28 (ones) = 42. So, 24 x 7 = 168.
Test: Multiplication - Question 9

What is the result of 16 x 5 using the shortcut method?

Test: Multiplication - Question 10
Using the "Amazing Facts of Nine" trick, what is the product of 7 x 9?
Detailed Solution for Test: Multiplication - Question 10
When using the "Amazing Facts of Nine" trick for 7 x 9, the tens digit is one less than 7 (which is 6), and the tens digit plus the ones digit always equals 9. So, the answer is 63, and you can verify it by checking that 6 + 3 equals 9.
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