Volume 22
, Issue 2


Halley, like Newton, Darwin, Einstein and many others, is one of the few scientists whose names are familiar to us all.

Linus has a litre flask of pure orange juice and and empty litre flask.

Q.672 Find the least natural number whose last digit is 6 such that it increases by the factor 4 when this last digit is carried to the beginning of the number.

Q.648 Prove that no perfect square except 0 is the product of 6 consecutive integers.