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Recent questions tagged number-systems

1 vote
2 answers
1
How many pair of natural numbers are there, the differences of whose squares is $45$ ? $1$ $2$ $3$ $4$
asked Apr 3, 2020 in Quantitative Aptitude Lakshman Patel RJIT 9.2k points 27 445 804 112 views
0 votes
0 answers
2
A certain number consists of two digits whose sum is $9$. It the order of digits is reversed, the new number is $9$ less than the original number. The original number is : $45$ $36$ $54$ $63$
asked Apr 3, 2020 in Quantitative Aptitude Lakshman Patel RJIT 9.2k points 27 445 804 61 views
1 vote
1 answer
3
A two digit number is such that the product of the digits is $8$. When $18$ is added to the number, the digits are reversed. The number is : $18$ $24$ $81$ $42$
asked Apr 3, 2020 in Quantitative Aptitude Lakshman Patel RJIT 9.2k points 27 445 804 90 views
0 votes
0 answers
4
Find the number of numbers between $300$ to $400$ (both included) that are not divisible by $2,3,4$ and $5$ $50$ $33$ $26$ $17$
asked Apr 1, 2020 in Quantitative Aptitude Lakshman Patel RJIT 9.2k points 27 445 804 54 views
0 votes
1 answer
5
$x$ is a whole number. If the only common factors of $x$ and $x2$ are $1$ and $x,$ then $x$ is ________. $1$ a perfect square an odd number a prime number
asked Apr 1, 2020 in Quantitative Aptitude Lakshman Patel RJIT 9.2k points 27 445 804 158 views
0 votes
1 answer
6
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