Quiz Discussion

What is the unit digit in 27^20?

• 1]

  1

• 2]

  2

• 3]

  3

• 4]

  4

3897 X 999

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

A boy multiplied 987 by a certain number and obtained 559981 as his answer. If in the answer both 98 are wrong and the other digits are correct , then the correct answer would be :

• 1] 553681
• 2] 555181
• 3] 555681
• 4] 556581

If (64)² - (36)² = 20 x a, then a = ?

• 1]

  115

• 2]

  140

• 3]

  132

• 4]

  176

The digit in unit’s place of the product 71 × 72 × ..... × 79 is

• 1]

  2

• 2]

  0

• 3]

  6

• 4]

  4

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

• 1] 07
• 2] 77
• 3] 87
• 4] 97

The sum of first five prime numbers is:

• 1]

  11

• 2]

  18

• 3]

  26

• 4]

  28

Which of the following number should be added to 11158 to make it exactly divisible by 77?

• 1]

  5

• 2]

  6

• 3]

  7

• 4]

  8

What should be the maximum value of Q in the following equation?
5P9 – 7Q2 + 9R6 = 823

• 1]

  6

• 2]

  7

• 3]

  8

• 4]

  9

72519 X 9999

• 1] 725117481
• 2] 834782931
• 3] 747829383
• 4] 648392011