Mark the correct alternative in the following:

Sum of all two digit numbers which when divided by 4 yield unity as remainder is


Two digits numbers which when divided by 4 yield unity as remainder is A.P. as 13, 17, 21,…,97


In this A.P., first term is a=13


Last term is l=97


And d=17-13=4


Now, l=an=a+(n-1)d


97=13+(n-1)4


84=(n-1)4


21=n-1


n=22


Now,



=11×110


=1210

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