**61.**When 60 is subtracted from 60% of a number, the result is 60. The number is

(a) 120

(b) 150

(c) 180

(d) 200

**62.**The name of the particle ‘Boson’ is associated with the name of

(a) J.C. Bose

**(b) S.N Bose**

(c) Isaac Newton

(d) Albert Einstein

**63.**If 2x+ 1/3x=6, then the value of 3x + 1/2x will be

(a) 4

(b) 8

(c) 9

(d) 12

**64.**If a proton of mass m is moving with velocity of light, its mass will be

(a) unchanged

(b) large but finite

(c) infinite

(d) zero

**65.**If (x+a/b+c) + (x+b/c+a)+(x+c/a+b)+3=0, then the value of x is

(a) a+b+c

(b) –(a+b+c)

(c) Ö(a+b+c)

(d) a

^{2}+b

^{2}+c

^{2}

^{}

**66.**If 60% of 35% of a number is 10.5, then the number will be-

**(a) 50**

(b) 100

(c) 40

(d) 70

**67.**Salim borrowed Rs. 50000 at 12% p.a. interest and cleared the account by paying Rs. 40000 and his motorcycle at the end of 3 years. Find the cost of the motor cycle.

(a) Rs. 30000

(b) Rs. 32000

(c) Rs. 35000

(D) Rs. 28000

**68.**The image formed by the eye on the retina is

(a) real, inverted, diminished

(b) real, upright, magnified

(c) real,upright, diminished

(d) virtual, inverted, diminished

**69.**If the 2

^{nd}term of an AP is 13 and the 5

^{th}term is 25, what is the 7

^{th}term?

(a) 30

(b) 33

(c) 37

(d) 38