Q 1-54.327 x 357.2 x 0.0057 is the same as :

A - .4327 x 3.572 x 5.7

B - 5.4327 x 3.572 x 0.57

C - 54327 x 3572 x 0.0000057

D - None of these

Answer - A

Explanation

"Number of decimal places in the given expression = 8

Number of decimal places in (a) = 8

Number of decimal places in (b) = 9

Number of decimal places in (c) = 7

Clearly, he expression in (a) is the same as the given expression"

Q 2-Given 168 x 32 = 5376, hen 5.376÷ 16.8 is equal to :

A - 0.032

B - 0.32

C - 3.2

D - 32

Answer - B

Explanation

"Given, 168 x 32 = 5376 or 5376 ÷ 168 = 32 
Now, [5.376/16.8] = [53.76/168]
 = [(5376/168) ×1/100)}] = (32/100) 
= 0.32"

Q 3-When 52416 is divided by 312, the quotient is 168. What will be the quotient when 52.416 is divided by 0.0168 ?

A - 3.12

B - 312

C - 3120

D - None of these

Answer - C

Explanation

"Given , (52416/312) = 168 
⇔ (52416/168)= 312 
Now, (52.416/0.0168) = [(52416)/(168)*10] 
= (312 x 10) 
=3120"

Q 4-If 213 x 16 = 3408, then 1.6 x 21.3 is equal to :

A - 0.3408

B - 3.408

C - 34.08

D - 340.8

Answer - C

Explanation

[1.6] x [21.3] = [(16/10×213/10)] = [(16×213)/100] = 3408/100 = 34.08

Q 5-12.1212 + 17.0005 - 9.1102 = ?

A - 20.0015

B - 20.0105

C - 20.0115

D - 20.1015

"Given expression :
(12.1212 +17.0005) - 9.1102
= 29.1217 - 9.1102
= 20.0115"

Answer - 

Explanation

Q -
A -
B -
C -
D -

Answer - 

Explanation

Q 6-The value of 4.12¯ is

A - 4(11/90)

B - 4(11/99)

C - 371/900

D - None of these

Answer - A

Explanation

[4.12¯] = [4 + 0.12¯ ]=  [4 + (12−1)/90] =  [4(11/90)]

Q 7-The value of ( 9 + .9 + .09 + .009) is :

A - 9.009

B - 9.099

C - 9.233

D - 9.999

Answer - D

Explanation

1.0 + 0.1+0.01+0.001 =1.111

Q 8-1/0.04 is equal to :

A - 1/40

B - 2/5

C - 2.5

D - 25

Answer - D

Explanation

[1/0.04]=[100/4]=25

Q 9-4.036 divided by 0.04 gives :

A - 1.009

B - 10.09

C - 100.9

D - none of these

Answer - C

Explanation

[4.036/0.04] =  [403.6/4]= 100.9

Q 10-0.213 ÷0.00213 = ?

A - 1

B - 10

C - 100

D - none of these

Answer - C

Explanation

"[0.213/0.00213] = [(0.213/0.00213)×(1000000/100000)] 
= (213×100)/213= 100"

Q 11-Which is the closest approximation to he product 0.3333 x 0.25 x 0.499 x 0.125 x 24 ?

A - 1/8

B - 3/4

C - 3/8

D - 2/5

Answer - A

Explanation

"Given product 
= 0.3 x 0.25 x 0.5 x 0.125 x 24 
= [(3/10×25/100×5/10×125/1000)×24] 
= [9/80] = [1/8] (App.)"

Q 12-How many digits will be there to the right of the decimal point in the product of 95.75 and .02554 ?

A - 5

B - 6

C - 7

D - none of these

Answer - B

Explanation

"Sum of decimal places = 7. 
Since the last digit to the extreme right will be zero ( ∴5 x 4 = 20), 
so there will be 6 significant digits 
to the right of the decimal point"

Q 13-3 x 0.3 x 0.03 x 0.003 x 30 = ?

A - 0.0000243

B - 0.000243

C - 0.00243

D - 0.0243

Answer - C

Explanation

"3 x 3 x 3 x 3 x 30 = 2430. 
Sum of decimal places = 6. 
∴ 3 x 0.3 x 0.03 x 0.003 x 30 
= 0.002430 = 0.00243"

Q 14-892.7 - 573.07 - 95.007 = ?

A - 224.623

B - 224.777

C - 233.523

D - 414.637

Answer - A

Explanation

"Given expression
 = 8927 - (573.07 + 95.007)
= 8927 - 668.077
 = 224.623."

Q 15-0.014 x 0.014 = ?

A - 0.000196

B - 0.00196

C - 19.6

D - 196

Answer - A

Explanation

"14 x 14 = 196 
sum of decimal places = 6 
∴ 0.014 x 0.014 
= 0.000196"

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