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).
 (2/3) x (6/8) x (2/3) x (3/4) = ?

 0.25
 0.5
 1.45
 11.8

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(2/3) x (6/8) x (2/3) x (3/4) = 1/4
Correct Option: A
(2/3) x (6/8) x (2/3) x (3/4) = 1/4 = 0.25
 15^{7}/_{8} x 23^{1}/_{5} + 3^{4}/_{5} x 5^{1}/_{8} = ?

 360
 350
 370
 385

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? = 127/8 x 116/5 + 19/5 x 41/8
= 14732/40 + 779/40 = 15511/40Correct Option: D
? = 127/8 x 116/5 + 19/5 x 41/8
= 14732/40 + 779/40 = 15511/40 = 387.7 ≈ 385
 2^{3}/_{5} x 15/26 x 283.75 = ?

 440
 435
 410
 425

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? = 2^{3}/_{5} x 15/26 x 283.75
≈ 13/5 x 15/16 x 284Correct Option: D
? = 2^{3}/_{5} x 15/26 x 283.75
≈ 13/5 x 15/16 x 284 = 426 ≈ 425
 36.98276421 x 21.00002 = ?

 775
 785
 800
 805

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36.98276421 x 21.00002
Using nearest value in whole number for 36.9827421 is 37 and 21.0002 is 21
≈ 37 x 21Correct Option: A
36.98276421 x 21.00002
Using nearest value in whole number for 36.9827421 is 37 and 21.0002 is 21
≈ 37 x 21 = 777 ≈ 775
 14.995 x 8.001 x 20.991 = ?

 1950
 2520
 2200
 1520

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? = 14.995 x 8.001 x 20.991
≈ 15 x 8 x 21Correct Option: B
? = 14.995 x 8.001 x 20.991
≈ 15 x 8 x 21 = 2520