Table of Contents

## What is the second smallest positive integer that is a multiple of 28 and 70?

In the intersection multiples of 28 ∩ multiples of 70 the least positive element is 140. Therefore, the least common multiple of 28 and 70 is 140.

**What is the LCM of 27 and 70?**

The LCM of 27 and 70 is 1890.

**What is the LCM of 70?**

The value of LCM of 70, 90 is the smallest common multiple of 70 and 90.

### What is the LCM of 28 and 72?

The LCM of 28 and 72 is 504.

**What is the least positive number?**

number 1

So, the number 1 is the smallest positive integer.

**What is the HCF of 30 and 42?**

6

Answer: HCF of 30 and 42 is 6.

#### What is the LCM of 80?

To find the LCM of 80 and 100 using prime factorization, we will find the prime factors, (80 = 2 × 2 × 2 × 2 × 5) and (100 = 2 × 2 × 5 × 5). LCM of 80 and 100 is the product of prime factors raised to their respective highest exponent among the numbers 80 and 100. ⇒ LCM of 80, 100 = 24 × 52 = 400.

**What is the LCM of 63 70 and 77?**

6930

Answer: LCM of 63, 70, and 77 is 6930.

**What’s the least common multiple of 27 and 15?**

135

Answer: LCM of 15 and 27 is 135.

## What is the LCM of 12 and 20?

60

The LCM of 12 and 20 is 60. To find the least common multiple of 12 and 20, we need to find the multiples of 12 and 20 (multiples of 12 = 12, 24, 36, 48 . . . . 60; multiples of 20 = 20, 40, 60, 80) and choose the smallest multiple that is exactly divisible by 12 and 20, i.e., 60.

**What is the most boring number?**

The number turns out to be 12407. Of course, if you are reading this in the future, the number may be different as someone may have found a use for 12407 in a sequence. During the programme, Stephen Fry relates the story of 1729.

**Which is the biggest positive number?**

The number 2,147,483,647 (or hexadecimal 7FFFFFFF16) is the maximum positive value for a 32-bit signed binary integer in computing.