If the length of a chord of a circle is equal to that of the radius of the circle, then the angle subtended, in radians, at the centre of the circle by chord is:

• 1

• 

• 

• 

The value of (sec²45° - cot²45°) - (sin²30° + sin²60°) is

• 1

• 

• 0

• 

The average salary of male employees in a firm was â‚¹ 5,200/- and that of females was â‚¹ 4,200/-. The mean salary of all the employees was â‚¹ 5,000/-. What is the percentage of female employees?

• 80%

• 20%

• 40%

• 30%

If  then the value of 

• 1

• -1

• 4

• 

The cube of 105 is

• 1157625

• 1175625

• 1185625

• 1158625

In Δ ABC, ∠B is right angle, D is the mid point of the side AC. If AB = 6 cm, BC = 8 cm, then the length of BD is

• 4 cm

• 5 cm

• 8 cm

• 12 cm

The diagonals of two squares are in the ratio 5 : 2. The ratio of their areas is:

• 5 : 6

• 25 : 4

• 5 : 4

• 125 : 8

68.

The angle of elevation of a ladder leaning against a wall is 60° and the foot of the ladder is 4.6 m away from the wall. The length of the ladder is

• 2.3 m

• 4.6 m

• 9.2 m

• 7.8 m

The product of two 2-digit number is 2160 and their H.C.F. is 12. The numbers are:

• (12, 60)

• (72, 30)

• (36, 60)

• (60, 72)

The difference between simple and compound interests compounded annually on a certain sum of money for 2 years at 4% per annum is â‚¹ 1/-. The sum (in ₹) is:

• ₹ 620/-

• ₹ 630/-

• ₹ 640/-

• ₹ 625/-