Directions: What value should come in place of question mark?
Important for :
» Explain it
C
?  =  324
529 ?

? = 529 × 324

? = 23 × 18

? = 414

Hence, option C is correct.
 
2
2  ÷  1  of  1  ÷  1  = ?
3 3 2 6
» Explain it
B
2  ÷  1  of   1  ÷  1  = ?
3 3 2 6

⇒  2  ÷  1  of  1  ÷  1  = ?
3 3 2 6

⇒  2  ÷  1  ÷  1  = ?
3 6 6

⇒  2  × 6 × 6 = ?
3

⇒ ? = 24

Hence, option B is correct.

3
125 × 625 ÷ 25 = (5)(13 – ?)
» Explain it
B
125 × 625 ÷ 25 = (5)(13 – ?)

⇒ (5)3 × 52 = (5)(13 – ?)

⇒ ? = 13 – 5

⇒ ? = 8

Hence, option B is correct.

4
216 × 36 ÷ 1296 = (6)?–3
» Explain it
C
216 × 36 ÷ 1296 = (6)?–3

⇒ 216 × 36 ÷ 1296 = (6)?–3

⇒ 63 × 62 ÷ 64 = (6)?–3

Taking the power, we get

⇒ 3 + 2 – 4 = ? – 3

⇒ 3 + 2 – 4 + 3 = ?

⇒ ? = 4

Hence, option C is correct.

5
73 + 82 = 52 + x% of 400
» Explain it
D
73 + 82 = 52 + ?% of 400

⇒ 343 + 64 = 25 + 4x

⇒ 382 = 4x

⇒ x = 382/4

⇒ x = 95.5

Hence, option D is correct.