Quantitative Aptitude :: Numbers - Discussion
Home > Quantitative Aptitude > Numbers > MCQs Questions Discussion
374 / 115
Choose the correct option.
How many prime numbers are there which are less than 100 and greater than 3 such that they are of the following forms 4x + 15y - 1
A11
B12
C2
D7
Answer: Option (Login/Signup)
Show Explanation
Asked In ::
STEP-BY-STEP
4x + 1 = 5y-1
5y-4x = 2
let x = 2, y = 2
4*2+1 = 5*2-1
9 = 9
4*7+1 = 5*6-1
29 = 29
4*17+1 = 5*14-1
69 = 69
4*22+1 = 5*18-1
89 = 89
Read Full Answer
Report Error
Please Login First Click Here