2. The numbers 240 and 252, written as the products of their prime factors,
are 240 = 24 x 3 x 5 and 252 = 22 x 32 x 7. Find
(i) the smallest non-zero whole number n for which 240n is a multiple of 252,
240
(ii) the smallest non-zero whole number m for which is a factor of 252.
m

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?

What is always true about a positive integer raised to a negative odd power?

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.