4 61 + 4 62 + 4 63 + 4 64 is divisible by what ?
In the case of 4,the unit values are 4 and 6The unit value:For x=odd no:(1,3,5,..), 4 raised to x = 4For x=even no:(2,4,6,..), 4 raised to x = 6
(461+ 462+ 463+ 464) = 461x (1 + 4 + 42+ 43) = 461x 85
= 460x (4 x 85)
= (460x 340), which is divisible by 10 and 5.
therefore461+ 462+ 463+ 464is divisible by 5and 10.