4. find a pair of factors of 368 whose sum is 39.
5. find a pair of factors of 240 whose difference is 1.
6. find three factors whose product is 2 310 and whose sum is 42.
7. mr. torres spent p2,000 on some pens, wallets, and watches. he bought
the same number of pens and watches. the prices of each pen, wallet, and
watch were p90, p120, and p140, respectively.
a. how many watches did he buy?
b. how many items did he buy in all?
8. find the least number to be added to 9823 so that the result is a multiple of 6.
9. jim was less than 60 years old now. his present age is a multiple of 9. last
year, his age was a multiple of 5. how old is he now?
10. how many twelves are there in the product of 1023 x 24?
11. axa= 400 and axbx 10 = 3 400. what is the value of b?
12. a. what is the smallest 3-digit number that can be divided by 13 without a
remainder?
b. what is the largest 3-digit number that can be divided by 15, 25, and 60?