Quiz-1

Correct option A

Solution:  (1.67-1.45)(1.67+1.45)(1.67-1.45)

= 3.12*0.22*0.22

=0.151

Correct option A

Solution: (1.9-0.4) [(1.9)^2+(0.4)^2+(1.9*0.4)] / (1.9-0.4)2

= [(1.9)2+(0.4)2+(1.9*0.4)] / (1.9-0.4)

= 3.02

Correct option C

Solution:  0.565656 = 565656/1000000

Correct option B

Solution:  0.007x = .01

x = 0.007.01 = 710 = 0.7

Solution:  4359 + 12.457 - x = 4200

x = (4359 + 12.457) – 4200

x = 4371.457 – 4200

x = 171.457

Correct option B

Solution: 5 * 125 = 625

Sum of decimal places = 6

Therefore, .05*0.0125 = 0.000625

It can be written as 6.25 * 10-4

Correct option A

Solution: 1220.122 = 12.2x

= 1220.122/12.2= x

= 100.01

Correct option C

Solution: 24.5554

Correct option D

Solution: 2012510000 = 201+2510000 = 201 + 0.00025 = 201.00025

Correct option C

Solution: 12.250.25 = 122500/2500 = +1225/25 = 49