## Approximation

#### Approximation

Direction: What approximate value should come in place of the question mark(?) in the following question ? (Note that you are not expected to calculate the exact value).

1. 17.995 x 16.005 +15.999 x 15.001 = ?
1. 513
2. 528
3. 440
4. 818

1. ? = 17.995 x 16.005 + 15.999 x 15.001
= 18 x 16 + 16 x 15 = 16 x (18 + 15)

##### Correct Option: B

? = 17.995 x 16.005 + 15.999 x 15.001
= 18 x 16 + 16 x 15 = 16 x ( 18 + 15)
= 16 x 33 = 528

1. 127.007 x 7.998 + 6.05 x 4.001 = ?
1. 1090
2. 1200
3. 1120
4. 1040

1. ? = 127.007 x 7.998 + 6.05 x 4.001
= 127 x 8 + 6 x 4

##### Correct Option: D

? = 127.007 x 7.998 + 6.05 x 4.001
= 127 x 8 + 6 x 4 = 1016 + 24 = 1040

1. 198.995 x 12.005 + 16.25 x 6.95 = ?
1. 2580
2. 2550
3. 2400
4. 2500

1. ? = 198.995 x 12.005 + 16.24 x 6.95
= 199 x 12 +16 x 7

##### Correct Option: D

? = 198.995 x 12.005 + 16.24 x 6.95
= 199 x 12 +16 x 7 = 2388 + 112 = 2500

1. 2375.85 ÷ 18.01 - 4.525 x 8.05 ?
1. 103
2. 96
3. 88
4. 90

1. ? = 2375.85 ÷ 18.01 - 4.525 x 8.05
= 2376 ÷ 18 - 4.5 x 8

##### Correct Option: B

? = 2375.85 ÷ 18.01 - 4.525 x 8.05
= 2376 ÷ 18 - 4.5 x 8 = 132 - 36 = 96

1. 2508 ÷ 15.02 + ? x 11 = 200
1. 13
2. 8
3. 3
4. 4

1. 2508 ÷ 15.02 ÷ ? x 11 = 200
⇒ 2508/15 + ? x 11 = 200

##### Correct Option: C

2508 ÷ 15.02 ÷ ? x 11 = 200
⇒ 2508/15 + ? x 11 = 200
∴ ? = (200 - 167.2) x 1/11 = 2.98 ≈ 3