Question

find a number between 1200 1400 which is divisible by 15 45 60

Answer 1

1260 is the correct answer  

300/12 = 23.xxxxx.  

First number is 312 and 312/13 = 24  

500/12 = 38.xxxxx. So last Number is 494

Total = 38-24 (Inclusive) = 15

The first no>300 and div by 13 is 312  

The last no is 494  

It’s a AP  

312, 312+13 ...494  

n2=n1+ (n-1) d  

494=312+ (n-1)*13=>n=15

Answer 2

Answer15 is the answer