Given: Number is 275+313 Calculation: We have 275+313 ⇒(33)5+313 ⇒315+313 Taking 313 common from bothe side, we get ⇒313(32+1) ⇒313×10 So, we can write 315+313=313×10 It means the number is divisible by 10 or (10×3n) where 1≤n≤13 According to the option ∴ The correct answer is 10 .