The least number which leaves a remainder of 3 when divided by 2, 5, 7, 10 and 15 is
213
LCM of 2,5,7,10 and 15 is 210
For remainder 3 we have to add 3 to the LCM = 210 + 3
The least number which leaves a remainder 3 when divided by 2, 5, 7, 10 and 15 is 213