The traffic lights at three different signal points change after every 45 seconds, 75 seconds and 90 seconds respectively. If all change simultaneously at 7:20:15 hours, then they will change
again simultaneously at

• 7:27:30 hours

• 7:28:00 hours

• 7:27:50 hours

• 7:27:50 hours

If the product of zeroes of the polynomial ax2 - 6x - 6 is 4, find the value of 'a'

• -3/2

• -1/2

• 3/2

• 3/2

The angles between the hands of a clock when the time is 4:25 am is:

• 14½ degrees

• 12½ degrees

• 17½ degrees

• 17½ degrees

4 The mean of 72 items was found to be 63. If two of the items were misrecorded as 27 and 9 instead of 72 and 90 respectively, find the correct mean.

• 64.75

• 64.25

• 63.25

• 63.25

If a boy is standing at the top of the tower and another boy is at the ground at some distance from the foot of the tower, then the angle of elevation and depression between the boys when both
look at each other will be

• Angle of elevation will be greater

• Cannot be predicted for relation

• Angle of depression will be greater

• Angle of depression will be greater

A man buys Rs. 20 shares paying 9% dividend. The man expects to have an interest of 12% on his money. The market value of each share is

• Rs. 18

• Rs. 15

• Rs. 12

• Rs. 12

A shop gives 15% discount on the purchase of a T.V. If paid for in cash immediately, a further discount of 12% is given. If the marked price is Rs. 15,000, what is the price of the T.V if
cash purchase is made?

• Rs. 12,750

• Rs. 11,220

• Rs. 10,950

• Rs. 10,950

A circular park, 42 m in diameter, has a path 3.5 m wide running around it on the outside.Find the cost of gravelling the path at Rs. 4 per m2

• Rs. 1672

• Rs. 1652

• Rs. 2002

• Rs. 2002

A patient in a hospital is given soup daily in a cylindrical bowl of dia meter 7 cm. If the bowl is filled with soup to a height of 4 cm, how much soup the hospital has to prepare daily to serve 250
patients?

• 40 litres

• 38 litres

• 38.5 litres

• 38.5 litres

A train which is moving at an average speed of 40 kmph, reaches its destination on time. When its average speed reduces to 35 kmph, then it reaches its destination 15 minutes late. The distance travelled b y the train is:

• 80 kms

• 40 kms

• 70 kms

• 70 kms