Simplification and Approximation

A. 4334.04
B. 4243.04
C. 4343.04
D. 4433.04
Explanation:
? = 4343.04

A. 36
B. 144
C. 288
D. 72
Explanation:
1296 ÷ 18 = ?
=> ? = 72

A. 312.73
B. 373.12
C. 337.12
D. 339.12
Explanation:
? = 43/100 * 784 = 337.12

A. 178
B. 7850
C. 5200
D. 4800
Explanation:
2578 + 20581 – 17889 = 2600 + 20600 – 18000
= 23200 – 18000 = 5200

A. 52
B. 62
C. 58
D. 78
Explanation:
15/100 * 195 + 14/100 * 205 = 15/100 * 200 + 14/100 * 200
= 30 + 28 = 58

A. 651
B. 361
C. 100
D. 95
Explanation:
³√216400 + √280 + √322
= 60 + 16.5 + 18 = 94.5 = 95

A. 785600
B. 315000
C. 845000
D. 442000

Explanation:
105 * 99 * 299 = 105 * 100 * 300 = 315000

A. 4890
B. 40000
C. 271
D. 5996
Explanation:
105.126 * 35.201 – 90.23 * 3 + 55.11 * 27.01
= 105 * 35 – 90 * 3 +55 * 27 = 3675 – 270 + 1485
= 5160 – 270 = 4890

A. 0.1
B. 0.2
C. 0.3
D. 0.4
Explanation:
As numerator is of the form a2 – b2 = (a + b) (a – b), so the given expression simplifying becomes
(0.92 – 0.82)/(0.9 + 0.8) (0.9 + 0.8) (0.9 – 0.8)/0.9 + 0.8 = 0.1

A. 0.1
B. 0.2
C. 0.3
D. 0.4
Explanation:
As numerator is of the form a2 – b2 = (a + b) (a – b), so the given expression simplifying becomes
(0.92 – 0.82)/(0.9 + 0.8) (0.9 + 0.8) (0.9 – 0.8)/0.9 + 0.8 = 0.1