Quiz Discussion

The largest natural number which exactly divides the product of any four consecutive natural numbers is:

• 1]

  6

• 2]

  12

• 3]

  18

• 4]

  24

Which of the following is a prime number ?

• 1] 97
• 2] 93
• 3] 33
• 4] 81

The sum of first five prime numbers is:

• 1]

  11

• 2]

  18

• 3]

  26

• 4]

  28

Which one of the following numbers is exactly divisible by 11?

• 1]

  235641

• 2]

  245642

• 3]

  315624

• 4]

  415624

3897 X 999

• 1] 3892109
• 2] 3893106
• 3] 3893103
• 4] 3929103

Find the last 2 digit of 7^85 (Using Euler Theorem)

• 1] 07
• 2] 77
• 3] 87
• 4] 97

What is the unit digit in 27^20?

• 1]

  1

• 2]

  2

• 3]

  3

• 4]

  4

The smallest value of n, for which 2n+1 is not a prime number, is

• 1]

  3

• 2]

  4

• 3]

  5

• 4]

  6

The difference between a positive proper fraction and its reciprocal is 9/20. The fraction is:

• 1]

  3/5

• 2]

  3/10

• 3]

  4/5

• 4]

  4/3

(112 x 5⁴) = ?

• 1]

  67000

• 2]

  70000

• 3]

  76500

• 4]

  77200