Question 1
1 Mark
What is the sum of all the divisors of 90?
Options
Option A
233
Option B
228
Option C
204
Option D is correct
234
Questions & Answers: "HCF and LCM"
Complete guide to "HCF and LCM" for Math students. Below you will find important questions and model answers to help you prepare.
7 Questions
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Question 2
1 Mark
Double of the common factors of two co-prime numbers is _______.
Options
Option A
Smaller of the two co-prime numbers.
Option B
Greater of the two co-prime numbers.
Option C
1
Option D is correct
2
Question 3
1 Mark
Select the correct statement.
Options
Option A
Smallest divisor of 15 is 3.
Option B is correct
Only three divisors of 18 are even numbers.
Option C
Any prime number has more than 2 divisors.
Option D
Number of divisors is unlimited.
Question 4
1 Mark
Which of the following number is not divisible by 17?
Options
Option A is correct
217
Option B
272
Option C
153
Option D
459
Question 5
1 Mark
A number is divided by 25 to get quotient 26 and remainder 2 if the same number is divided by 30 then what is the quotient and remainder respectively?
Options
Option A is correct
21, 22
Option B
25, 7
Option C
25, 4
Option D
22, 8
Question 6
1 Mark
By how much more or less is the number of divisors of 60 to that of the divisors of 75?
Options
Option A is correct
more by 6
Option B
less by 6
Option C
more by 4
Option D
less by 4
Question 7
1 Mark
Find the largest 5-digit number which is completely divisible by 8 using digits 5, 0, 4, 8 and 6 only once.
Options
Option A is correct
86504
Option B
86540
Option C
80456
Option D
65408