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.
