Let `n=1! +4! +7! +. . . +400 !` then ten's digit of n is

If n=1!+4!+7!+......+400! then ten's digit of ln' is

If S=1!+4!+7!+10!+ . . .+400!, then Q. The ten's digit in the number S is divisible by

If S=1!+4!+7!+10!+ . . .+400!, then Q. The last two digits in (1!+4!+7!)! is

If S=1!+4!+7!+10!+ . . .+400!, then Q. The last two digits in (1!+4!+7!)! is

The ten's digit of 1!+2!+3!+ . . .+97! is

The ten's digit of 1!+2!+3!+ . . .+97! is

The ten's digit of 1!+2!+3!+ . . .+97! is

The ten's digit of 1!+2!+3!+ . . .+97! is

The ten's digit of 1!+2!+3!+ . . .+97! is

Consider number N = 8 7 a 2 7 9 3 1 b, where b is a digit at unit's place and a is a digit at ten lakh's place. The greatest value of b for which N is divisible by 8 is (A9 prime (B) composite (C) even (D) odd