(PLEASE HELP ASAP!) (a) Find the HCF of 12, 40 and 45.
(b) Find the LCM of 12, 40 and 45. (c) Find the greatest 4-digit number which is a common multiple of 12, 40

Find the prime factorization of
(i) 12,
(ii) 144,
(iii) 5040. (b) The HCF and LCM of two numbers are 12 and 5040 respectively. If one
of the numbers is 144, find the other number.

A bell rings every 25 minutes while another bell rings every 40 minutes.
Suppose they rang together at 6 a. m., when will they ring together again?

A box contains an assortment of 3 types of chocolate bars. It has 18 bars with almonds, 24 bars with hazelnuts and 30 bars with peanuts. The chocolate bars are shared among some students. Each student has only one type of chocolate bar and every student has the same number of chocolate bars. Suppose each student has the greatest number of chocolate bars. (a) How many chocolate bars does each student have? (b) How many students will have chocolate bars with peanuts?

A rectangular board measures 630 cm by 396 cm. It is divided into small squares of equal size. (a) (i) Find the largest possible length of the side of a square.
(ii) Find the least number of squares. (b) (i) Find the second largest possible length of the side of a square.
(ii) Find the number of squares in this case.