# 2019 Class 10 Maths Sample Question Paper | Question 7

#### 2 Mark Question 7 - Internal Choice 1 | HCF & LCM

This 2019 CBSE class 10 Maths sample paper 2 mark question is from real numbers. The question tests a property about LCM and HCF of two numbers and the product of those two numbers.

Question 7A: The HCF and LCM of two numbers are 9 and 360 respectively. If one number is 45, find the other number.

## NCERT Solution to Class 10 Maths

### Explanatory Answer | Class 10 Maths 2019 SQP Q7

##### Property: Product of the HCF and LCM of two numbers is equal to the product of the two numbers.

Let the other number be b.
HCF × LCM = 45 × b
9 × 360 = 45 × b
b = ($$frac{9 × 360}{45}$) =$$\frac{360}{5}$) = 72

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