Questions

Fill In The Blanks[1 Marks ]

🎯

Test yourself on this topic

16 questions · timed · auto-graded

Question 11 Mark
If the least prime factors of two positive integers a and b are 5 and 13 respectively, then the least prime factor of a + b, is __________.
Answer
2
View full question & answer
Question 71 Mark
Two numbers are in the ratio 21: 17. If their HCF is 5, the numbers are __________ and __________.
Answer
85, 105
View full question & answer
Question 81 Mark
The HCF and LCM of two numbers are 33 and 264 respectively. When the first number is completely divided by 2 the quotient is 33. The other number is __________.
Answer
132
View full question & answer
Question 101 Mark
If the HCF and LCM of two a and b are x and y respectively, then $\frac{x^2 y^2}{a^2 b^2}$= __________.
Answer
1
View full question & answer
Question 111 Mark
If two positive integers m and n are expressible in the form $m=a^2 b^3$ and $n=a^3 b^2$, where a, b are prime numbers, then HCF (m, n) =__________ and LCM (a, b) = __________.
Answer
$a^2 b^2, a^3 b^3$
View full question & answer
Question 141 Mark
If $2^3 \times 3^a \times b \times 7$ is the prime factorisation of 2520, then 5a + 2b = __________.
Answer
20
View full question & answer