MATHZIZZ

HCF of 144 and 420 is 12 then their LCM is

• 6040

• 4200

• 1440

• 5040

Find the greatest number of 5 digits, that will give us remainder of 5, when divided by 8 and 9 respectively.

• 99921

• 99931

• 99941

• 99951

If a and b are two positive integers such that a = 14b. Find the HCF of a and b.

• a

• b

• 14b

• 14a

The ratio between the LCM and HCF of 5, 15, 20 is:

• 9:1

• 4:3

• 11:1

• 12:1

Two alarm clocks ring their alarms at regular intervals of 50 seconds and 48 seconds. If they first beep together at 12 noon, at what time will they beep again for the first time?

• 12:20

• 12:11

• 12:12

• none of these

What will be the least possible number of the planks, if three pieces of timber 42 m, 49 m and 63 m long have to be divided into planks of the same length?

• 20

• 21

• 22

• 23

Three sets of physics, chemistry and mathematics books have to be stacked in such a way that all the books are stored topic wise and the number of books in each stack is the same. The number of physics books is 192, the number of chemistry books is 240 and the number of mathematics books is 168. Determine the number of stacks of physics, chemistry and mathematics books

• 8,10,7

• 8,8,8

• 7,10,8

• 10,8,7

Write the HCF of smallest composite number and smallest prime number

• 1

• 2

• 3

• 4

Product of any two irrational numbers is always irrational

• True

• False

Two tanks contain 504 and 735 litres of milk respectively. Find the maximum capacity of a container which can measure the milk of either tank an exact number of times.