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The digit in the unit's place of the num...

The digit in the unit's place of the number `1! + 2! + 3! +.......+ 99!` is

A

3

B

0

C

1

D

7

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WB JEE PREVIOUS YEAR PAPER-QUESTION PAPER 2021-MULTIPLE CHOICE QUESTION
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  3. The digit in the unit's place of the number 1! + 2! + 3! +.......+ 99!...

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  4. If M is a 3xx3 matrix such that (0 1 2)M = (1 0 0), (3 4 5) M = (0 1 0...

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  5. Let A = [[0,-tanalpha//2],[tanalpha//2,0]] and I, the indentity matrix...

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  6. Let A and B be two non-singular skew symmetric matrices such that AB =...

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  7. If a(n)( gt 0) be the n^(th) term of a G.P. then |(log a(n), log a(...

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  8. Let A, B, C be three non-void subsets of set S. Let (A cap C) cup (B c...

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  9. Let T & U be the set of all orthogonal matrices of order 3 over R & th...

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  10. Four persons A, B, C and D throw an unbiased die, turn by turn, in suc...

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  11. The mean and variance of a binomial distribution are 4 and 2 respectiv...

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  12. Let S(n)=cot^(-1)2 +cot^(-1)8 +cot^(-1)18 +cot^(-1)32+…. to n^(th) te...

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  13. If a gt 0, b gt 0 then the maximum area of the parallelogram whose thr...

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  14. Let A be the fixed point (0, 4) and B be a moving point on x-axis. Let...

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  15. A moving line intersects the lines x + y = 0 and x-y= 0 at the points ...

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  16. The locus of the vertices of the family of parabolas 6y =2a^(3)x^(2) +...

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  17. A ray of light along x+sqrt(3)y=sqrt(3) gets reflected upon reaching x...

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  18. Two tangents to the circle x^(2)+y^(2)=4 at the points A and B meet a...

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  19. From a point (d, 0) three normals are drawn to the parabola y^(2)=x, t...

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  20. If from a point P(a, b, c), perpendiculars PA and PB are drawn to YZ a...

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