Quiz Discussion

The product of two numbers is 2028 and their HCF is 13. The number of such pairs is :

• 1]

  1

• 2]

  2

• 3]

  3

• 4]

  4

The sum of two numbers is 528 and their HCF is 33. The number of such pairs is :

• 1]

  2

• 2]

  3

• 3]

  4

• 4]

  5

The L.C.M. of two numbers is 48. The numbers are in the ratio 2:3. Then sum of the number is:

• 1]

  40

• 2]

  50

• 3]

  60

• 4]

  35

Find the LCM of 2/3, 3/5, 4/7 and 9/13.

• 1]

  36

• 2]

  1/36

• 3]

  1/1365

• 4]

  12/455

The LCM and HCF of two numbers are 84 and 21, respectively. If the ratio of the two numbers is 1 : 4, then the larger of the two numbers is

• 1]

  12

• 2]

  48

• 3]

  84

• 4]

  108

Which of the following is a pair of co-primes?

• 1]

  (14,35)

• 2]

  (18,25)

• 3]

  (31,93)

• 4]

  (32,62)

The H.C.F. and L.C.M. of 0.63, 1.05 and 2.1

• 1]

  0.20 and 6.31

• 2]

  0.21 and 5.30

• 3]

  0.21 and 6.30

• 4]

  1.21 and 6.50

(4⁶¹+4⁶²+4⁶³+4⁶⁴) is divisible by

• 1]

  17

• 2]

  3

• 3]

  11

• 4]

  13

Which of the following has the most number of divisors?

• 1]

  99

• 2]

  101

• 3]

  176

• 4]

  182

 What is the greatest number which when subtracted from 3000, is exactly divisible by 7, 11 and 13 ?

• 1]

  1999

• 2]

  3000

• 3]

  10001

• 4]

  3050