Topic 1 Basic operations on numbers Terms

Is the number 1420 divisible by 2, 3, 4, 5, 6,7, 8, 9 and 10?

Show two rational and two irrational numbers between and π.

Find HCD and LCM of:

1) 28 and 36; 2) 12, 18 and 30; 3) 15, 10 and 6; 4) 252, 441 and 1080.

7. 
   Two numbers a and b are not equal, and both are taken from the set
   

Find the least possible value of .