Answer:
short cut:
1st portion:untit digit=>
5^2350 only considered power number:(2350-1)/4=remainder 1
5^1+remainder=5^1+1=5^2=25
so unit digit =>5
2nd portion :unit digit=>
7^350 only considered power number:(350-1)/4=remainder 1
7^1+remainder=7^1+17^2=49
so unit digit=>9
Answer=1st portion unit digit+2nd portion Unit Digit
==> 5+9=14
Answer is 4
(Important:(Any Power number-1)/4)
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