Question

Mr. X forgot his telephone number. All he remembers is that the 1% digit of the number is an
even prime number and the rest of the telephone number is square of a particular number.
Now this number (which is to be squared) comprises of the first four natural numbers in
ascending order. What is the telephone number of Mr. X?
1) 31522756
2) 21567432
3) 21730400
4) 21522756​

Answer 1

Answer:

4) 21522756

Step-by-step explanation:

one no. is even prime no. that is 2.

now the rest digits are square of 1st 4 natural no. arranged in ascending order. that is 1234×1234=1522756

so the no. will be 21522756

Answer 2

Answer:

4) 21522756

Step-by-step explanation:

We will take sq. root of all the options except their 1st digit & we'll find that sq. root of 1st & 4th option except their 1st digit will be '1234' which are the 1st four natural numbers. & the even prime no. is also present in 4th option at first digit........Hence the answer will be 4)