1. The HCF of two numbers is 8. Which one of the following can never be their LCM?

8

12

60

72

None of these


2. If 5x2 13xy + 6y2 = 0, then x: y is:

2 : 1 only

3 : 5 only

5 : 3 or 1 : 2

3 : 5 or 2 : 1

None of these


3. A, B, C hired a car for Rs.520 and used it for 7,8 and 11 hours respectively. Hire charges paid by B were

Rs.140

Rs.160

Rs.180

Rs.220

None of these


4. In how many different ways can the letters of the word 'OPTICAL' be arranged so that the vowels always come together?

120

720

4320

2160

None of these


5. One card is drawn at random from a pack of 52 cards. What is the probability that the card drawn is a face card (Jack, Queen and King only)?

1/13

3/13

1/4

9/52

None of these


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