Simplification and Approximation

A. 121
B. 1331
C. 14641
D. 2662
Explanation:
?/9261 = (11/21)3 = 1331/9261
=> ? = 1331

A. 1/2
B. 1/3
C. 1/4
D. 1/5
Explanation:
? = (98 / 7 / 2) / 14 = 1/2

A. 15
B. 20
C. 25
D. 35
Explanation:
? = (24 * 5 * 7 * 9) / 216 = 35

A. 2466.462
B. 2664.642
C. 2464.462
D. 2466.642

A. 8000
B. 8010
C. 8020
D. 8040
Explanation:
(2000 + 3)(2000 + 4) – (2000 + 1)(2000 + 2) = ?
Since (2000 * 2000) – (2000 * 2000) is equal to zero. ?
= (8000 + 6000 + 12) – (4000 + 2000 + 2)
=> ? = 14012 – 6002 = 8010

A. 18
B. 22
C. 24
D. 26
Explanation:
?2 = 3/7 * 4/9 * 2/5 * 7560
=> ?2 = 576 = 242
? = 24

A. 20
B. 40
C. 60
D. 80
Explanation:
32/100 * 425 – x/100 * 250 = 36
=> x/100 * 250 = 136 – 36 = 100
=> x = (100 * 100)/250 = 40

A. 1
B. 4
C. 2
D. 3
Explanation:
8 = (?)3
=> ?3 = 23 => ? = 2

A. 1506
B. 1606
C. 1706
D. 1496

A. 200
B. 400
C. 1600
D. 800
 
Explanation:
15625 * 8 + 35000 = (?)2
=> (?)2 = 125000 + 35000 = 160000
=> ?2 = 4002
? = 400