Rani was given 3 number cards and asked to form a 3-digit prime number by arranging the cards in any order, if possible. The cards she got were: 1, 2 & 6. In which way should Rani arrange the cards?
a) 162
b) 261
c) 621
d) it is not possible for Rani to make a prime number.
Answers
Answered by
12
Answer:
I think c because 6and 2 is even and 1 is odd
Answered by
4
(d) It is not possible for Rani to make a prime number
Step-by-step explanation:
Given numbers are 1, 2 and 6
Let us first understand what a prime number is :
=> A prime number is a number which has only two factors and they are 1 and the number itself OR a number which can only be divided by 1 and the number itself.
=> Here the given numbers are 1, 2 and 6, adding them we get 9 and 9 is divisible by 3.
∴ Any number made from the given digits will have a sum of 9 and hence will be divided by 3. So the number cannot be a prime number as it has more than two factors.
=> So any number made from 1, 2 and 6 will not be a prime number because it will not meet the conditions of a prime number.
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