## RS Aggarwal Class 6 Math Second Chapter Factors And Multiples Exercise 2F Solution

## EXERCISE 2F

**Mark (****√****) against the correct answer in each of the following:**

**(1) Which of the following numbers is divisible by 3?**

**Ans: (c) 83479560**

**(2) Which of the following numbers is divisible by 9?**

**Ans: (a) 8576901**

**(3) Which of the following numbers is divisible by 4?**

**Ans: (d) 87941032**

**(4) Which of the following numbers is divisible by 8?**

**Ans: (b) 37450176**

**(5) Which of the following numbers is divisible by 6?**

**Ans: (a) 8790432**

**(6) Which of the following numbers is divisible by 11?**

**Ans: (c) 22222222**

**(7) Which of the following is a prime number?**

**Ans: (d) 97**

**(8) Which of the following is a prime number?**

**Ans: (c) 179**

**(9) Which of the following is a prime number?**

**Ans: (c) 263**

**(10) Which of the following are co-primes?**

**Ans: (b) 9, 10**

**(11) Which of the following is a composite number?**

**Ans: (c) 32**

**(12) The HCF of 144 and 198 is 18 .**

**(13) The HCF of 144, 180 and 192 is 12 .**

**(14) Which of the following are co-primes?**

**Ans: (b) 161, 192**

** (16) The greatest number which divides 134 and 167 leaving 2 as remainder in each case is 33 .**

**(17) The LCM of 24, 36, 40 is 360 .**

**(18) The LCM of 12, 15, 20, 27 is 540 .**

**(19) The smallest number which when diminished by 3 is divisible by 14, 28, 36 and 45, is 1263 .**

**(20) The HCF of two co-primes is 1 .**

**(21) If a and b are co-primes, then their LCM is ab .**

**(22) The product of two numbers is 2160 and their HCF is 12. The LCM of these numbers is 180 .**

**(23) The HCF of two numbers is 145 and their LCM is 21758. If one of the numbers is 725, the other number is 435 .**

**(24) The least number divisible by each of the numbers 15, 20, 24, 32 and 36 is 1440 . **

**(25) Three bells toll together at intervals of 9, 12, 15 minutes. If they start tolling together after what time will they next toll together?**

**Ans: (d) 3 hours.**