Direction : Study the following questions carefully and choose the right answer.
Important for :
1
What should come at the place of Question mark (?) in the following question?

301 –
168 –
544 +
 1042 – 324
= ? ÷ 3
» Explain it
B
301 –
168 –
544 +
 1042 – 324
= ? ÷ 3

301 –
168 –
544 +
 1042 –  18
= ? ÷ 3

301 –
168 –
544 +
 1024
= ? ÷ 3

301 –
168 –
 544 + 32
= ? ÷ 3

301 –
168 –
 544 +  32
= ? ÷ 3

301 –
168 –
 576
= ? ÷ 3

301 –
 168 – 24
= ? ÷ 3

301 –
 144
= ? ÷ 3

 301 – 12
= ? ÷ 3

 289
= ? ÷ 3

or, 17 = ? ÷ 3 or, ? = 51

Hence, option (B) is correct.

2
What will come in the place of question mark (?) in the following question:

1089 ÷ 1728 ÷ 11 + 225 = ?2 - 652.75
» Explain it
B
1089 ÷ 1728 ÷ 11 + 225 = ?2 - 652.75

1089 ÷ 12 ÷ 11 + 15 = ?2 – 652.75

8.25 + 652.75 + 15 = ?2

661 + 15 = ?2

?2 = 676

? = 26

Hence, option B is correct.
3
What will come in the place of question mark (?) in the following question:

72.9 ÷ 81 × 100 = ?1/2 ÷ 324 + 64
» Explain it
A
72.9 ÷ 81 × 100 = ?1/2 ÷ 324 + 64

72.9 ÷ 81 × 10 = ?1/2 ÷ 18 + 4

729 ÷ 81 = ?1/2 ÷ 18 + 4

9 – 4 = ?1/2 ÷ 18

5 × 18 = ?1/2

?1/2 = 90

? = 8100

Hence, option A is correct.
4
What will come in the place of question mark (?) in the following question:

48.3 × 289 ÷ 3.4 ÷ 23 ÷ 68 × 21 = ?3 + 28.125
» Explain it
B
48.3 × 289 ÷ 3.4 ÷ 23 ÷ 68 × 21 = ?3 + 28.125

483 × 289 ÷ 34 ÷ 23 ÷ 68 × 21 = ?3 + 28.125

441/ 8 = ?3 + 28.125

55.125 – 28.125 = ?3

?3 = 27

? = 3

Hence, option B is correct.
5
What will come in the place of question mark (?) in the following question:

 4 1 +  2 7 – 5 11 = ? + 2 4 3 4 3 3
» Explain it
E
 4 1 + 2 7 – 5 11 = ? + 2 4 3 4 3 3

 4 1 + 2 7 – 5 11 –2 4 = ? 3 4 3 3

 ? = (4 + 2 – 5 – 2) + 1 + 7 – 11 – 4 3 4 3 3

 ? = – 1 + 4 + 21 – 44 – 16 12

 ? = – 1 + (- 35 ) 12

 ? = – 1 – 35 12

 ? = – 47 = – 3 11 12 12

Hence, option E is correct.