Teachoo MCQ Test

10 Question MCQ (including Assertion)

Preparing for CBSE

Chapter 3 Class 7 - Finding Common Ground (Ganita Prakash II) | 10 questions

Timed test. Answer every question before time runs out. Correct answers and solutions appear after submission.
Time remaining 960
Question 1 of 10
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Question 1 of 10
How many positive common factors do 270 and 450 have?
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Question 2 of 10
In a simultaneous HCF–LCM procedure, 360 and 504 are divided by the common factor 72, leaving 5 and 7. What are the HCF and LCM?
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Question 3 of 10
Two warning lights flash together now. One flashes every 12 seconds and the other every 18 seconds. After how many seconds will they next flash together?
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Question 4 of 10
Two buses leave a terminal together at 9:00 a.m. One returns every 18 minutes and the other every 24 minutes. When will they next be at the terminal together?
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Question 5 of 10
Two numbers are in the ratio \(3:5\) and their HCF is 14. What are the numbers and their LCM?
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Question 6 of 10
A number \(k\) satisfies \(HCF(84,k)=12\) and \(LCM(84,k)=420\). What is \(k\)?
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Question 7 of 10
A dog starts 150 feet behind a rabbit. In the time the rabbit jumps 7 feet, the dog jumps 9 feet. After how many such leaps will the dog catch the rabbit?
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Question 8 of 10
Assertion (A): If two numbers have HCF 1 and LCM 77, the numbers must be 7 and 11.
Reason (R): Both pairs \((1,77)\) and \((7,11)\) have HCF 1 and LCM 77.
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Question 9 of 10
Assertion (A): If both numbers are doubled, their HCF doubles.
Reason (R): The LCM of two consecutive positive integers equals their product.
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Question 10 of 10
A number has only 2 and 3 as prime factors, is divisible by 72, and has exactly 12 positive factors. What is the number?
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