Direction: What approximate value should come in the place of question mark (?) in the following questions?
1
33.05% of 5010.11 +   1  of 2404.99 = ?
12.93
» Explain it
D
33.05% of 5010.11 +   1  of 2404.99 = ?
12.93

? ≈ 33% of 5010 +  1  of 2405
13

⇒ ? =  33  × 5010 +  1  × 2405
100 13

= 1653.30 + 185 = 1838.30 ≈ 1838

Hence, option D is correct.
 
2
98.98 ÷ 11.03 + 7.014 × 15.99 = ?
» Explain it
D
98.98 ÷ 11.03 + 7.014 × 15.99 = ?
 
Suppose, ? = x
 
Then 99 ÷ 11 + 7 × 16 = 9 + 112 = 121   (taking approximate value)
 
   x = 121

Hence, option D is correct.
 
3
103 × 1003 + 999999999 = 10? + 10?
» Explain it
B
Here 103 × 1003 + 999999999

= 103 × (102)3 + 109

= 103 × 106 + 109

= 103 + 6 + 109

= 109 + 109

Therefore, question mark will be replaced by 9.

Hence, option B is correct.




4
134% of 3894 + 38.94% of 134 = ?
» Explain it
D
134% of 3894 + 38.94% of 134
 
= 134% of 3894 + 3894 of 1.34%
 
= 134% of 3894 + 1.34% of 3894
 
= 135.34% of 3894
 
= 5270.1396  5270

Hence, option D is correct.
 
5
(21 + 99) × (30 – 19.02) = ?
» Explain it
E
(21 + 99) × (30 – 19.02)
 
= 120 × 10.98
 
= 120 × 11 = 1320

Hence, option E is correct.