Write 98 as a prouct of a prime factors

Ans 98 = 2x7x7

Since 98 ends with an even digit, we can tell that it is divisible by 2:

=> 98/2 = 49

Try possible factor prime:

a. 49 end with odd digits so not divisible by 2

b. The sum of its digits is 4+9=13, which is not divisible by 3, so 49 is not divisible by 3 either.

c. 49 does not end with 5 or 0 so not divisible by that 2 numbers

d. 49 divisible by 7 = > 49/7 = 7

===> 2x7x7

* A prime number is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers.