NUMBER AND LETTER SERIES 1

1.Find the Next number in the Series 10, 19, 28, 37, 46, 55, 64, 73, 82,. . . . .
                 [A]87                  [B]92
                  [C]91                 [D]90

91

Explanation

9 Is being added to the numbers
     10+9=19
     19+9=28
     28+9=37
     . . . .
     82+9=91
Answer is 91

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2.What is the next number in the series 3, 9, 10, 30, 31, .. .. .. ..?
         [A]40                 [B]59
         [C]93                 [D]101

93

Explanation

The given series is *3 +1
    3*3= 9 9+1=10
    10*3=30 30+1=31
    31*3=93
Answer is 93

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3. Look at the series 49,121,169, 289, 361,. . . . .? What Number Should come Next
         [A]529                 [B]484
         [C]576                 [D]324

529

Explanation

The Squares of the Consecutive prime numbers starting with 7 are written in the series. The Prime number next to 19 is 23
     23 * 23 = 529 Answer is 529

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Find the Last number in the Series 4.576,210,339,81,452,40,565,_________

         [A]50                 [B]310
         [C]150                 [D]624

150

Explanation

The Product of the individual digits in the first number gives the second number in every pair of numbers.
     579=5*7*6=210
     339=3*3*9=81
     452=4*5*2=40
     565=5*6*5=150
Answer is 150

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5. 5040, 720, 120, 24, 6, ... ... ...
         [A]4                 [B]2
         [C]3                 [D]1

2

Explanation

    

Answer: B

Explanation:The number are divided by 7,6,5,4, and now it should be 3 i.e Answer is 2

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