T2 CH1 Numbers Maths - T2 CH1 Numbers

The least number that should be added to 57 so that the sum is exactly divisible by 2, 3, 4 and 5 is __________

The LCM of 26, 39 and 52 is _________

The HCF of 45 and 75 is _________

The HCF of two successive even numbers is __________

If the LCM of 3 and 9 is 9, then their HCF is __________

Which of the following cannot be the HCF of two numbers whose LCM is 120?

The HCF of two numbers is 2 and their LCM is 154. If the difference between the numbers is 8, then the sum is

The greatest four-digit number which is exactly divisible by 8, 9 and 12 is

Which of the following pairs is co-prime?

The number 87846 is divisible by

The sum of any two successive odd numbers is always divisible by 4. Justify this statement with an example

Numbers divisible by 4 and 6 are divisible by 24. Verify this statement and support your answer with an example

State true or false and explain your answer with reason for the following statement.
A number is divisible by 6, if it is divisible by 12

State true or false and explain your answer with reason for the following statement.
A number is divisible by 9, if it is divisible by 3

The HCF of two numbers is always a factor of their LCM

Find the dates of any month in a calendar which are divisible by both 2 and 3.

Each of the composite numbers has atleast three factors. Justify this statement with an example.

Your friend says that every odd number is prime. Give an example to prove him/her wrong

Write the smallest and the biggest two digit prime number

The sum of three prime numbers is 80. The difference of two of them is 4. Find the numbers

For which of the numbers, from n = 2 to 8, is 2n − 1 a prime?

Wilson, Mathan and Guna can complete one round of a circular track in 10, 15 and 20 minutes respectively. If they start together at 7 a.m from the starting point, at what time will they meet together again at the starting point?

Find A as required:
The number A08 is divisible by 4 and 9

Find A as required:
The greatest 2 digit number 9A is divisible by 2

Find A as required:
The least number 567A is divisible by 3

Find A as required:
The greatest 3 digit number 9A6 is divisible by 6

Is 173 a prime? Why?

Find the length of the longest rope that can be used to measure exactly the ropes of length 1 m 20 cm, 3 m 60 cm and 4 m

The LCM of two numbers is 210 and their HCF is 14. How many such pairs are possible?

The traffic lights at three different road junctions change after every 40 seconds, 60 seconds and 72 seconds respectively. If they changed simultaneously together at 8 a.m at the junctions, at what time will they simultaneously change together again?

What is the greatest possible volume of a vessel that can be used to measure exactly the volume of milk in cans (in full capacity) of 80 litres, 100 litres and 120 litres?