1) X is three times the sum of the 5th and 4th multiples of 6.
Find X.

2) Multiple of 13?

3) Which of these is not a factor of 100?

4) A bakery packs cookies in boxes of 12.
If a customer buys 5 such boxes each week, how many cookies will he buy in 4 weeks?

5) Common multiple of 3 and 5?

6) 12.5 kg of flour is packed into packets of 250 g each.
How many packets are there?

7) 40 kg of rice is packed into small bags of 500 g each.
How many bags are there?

8) How many factors does the number 100 have?

9) A group of children claps every 12 seconds, another every 18 seconds.
After how many seconds will they clap together?

10) A number is divisible by 9 if the sum of its digits is divisible by:

11) 54 chairs and 72 tables are to be arranged in equal groups with no item left.
What is the greatest number of groups?

12) Find the LCM and HCF of 16 and 20.

13) The HCF of 3 numbers is 5 and LCM is 300. One number is 25 and another 30.
Find third number.

14) What is the product of 15 and 20?

15) Which number has only 1 and itself as factors?

16) A gardener wants to plant 40 rose plants and 60 marigold plants in rows such that each row has the same number of plants.
What is the greatest number of rows possible?

17) A baker has 48 cupcakes and 36 muffins.
He wants to pack them in boxes with equal number of each.
What is the largest number of boxes he can prepare?

18) A music teacher practices with students every 15 days, another every 20 days.
After how many days will they practice together again?

19) Find the sum of the common prime factors of 84 and 126.

20) Shreya has 150 candies.
She divides them equally among 6 friends.
How many candies does each get?