mcq on approximation with answers for bank exams
61) \(\displaystyle 59.88\div 12.21\times 6.35=?\)
(a) 10
(b) 50
(c) 30
(d) 70
(e) 90
Show Answer approximation , take the nearest values
62) \(\displaystyle 43931.03\div 2111.02\times 401.04=?\)
(a) 8800
(b) 7600
(c) 7400
(d) 9000
(e) 8300
Show Answer
63) \(\displaystyle \sqrt{{6354}}\times 34.993=?\)
(a) 3000
(b) 2800
(c) 2500
(d) 3300
(e) 2600
Show Answer Solution: (b)
\(\displaystyle ?=\sqrt{{6354}}\times 34.993\approx 80\times 35=2800\)
Try to practice this type of problems, without pen and paper. You need to be conversant with the some important squares and cubes. This comes with practicing mcq on approximation.
64) \(\displaystyle {{12.999}^{3}}=?\)
(a) 1800
(b) 2100
(c) 2000
(d) 2500
(e) 2200
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65) \(\displaystyle 50550\div 50\div 5=?\)
(a) 350
(b) 150
(c) 200
(d) 250
(e) 300
Show Answer
66) \(\displaystyle 49.0003\div 74.999=?\)
(a) 0.05
(b) 0.2
(c) 1
(d) 0.7
(e) 2
Show Answer Solution: (d)
\(\displaystyle ?=\frac{{49}}{{75}}=0.655\approx 0.7\)
Alternate method without pen and paper,
49 is approximately 50 and 74.9 is approximately 75 so we can see that its 2 parts to 3 parts with is nothing but 2/3 which is 0.66. so from the options we have (d) as the approximate value.
67) \(\displaystyle 23.003\times 22.998+100.010=?\)
(a) 630
(b) 550
(c) 700
(d) 720
(e) 510
Show Answer
68) 125.009 + 69.999 + 104.989 = ?
(a) 420
(b) 300
(c) 285
(d) 415
(e) 325
Show Answer Solution: (b)
By approximation method, take nearest whole values
\(\displaystyle ?\approx 125\text{ }+70+105\approx 195+105\approx 300\)
69) \(\displaystyle 9125\div 90\div 9=?\)
(a) 27
(b) 3
(c) 7
(d) 21
(e) 11
Show Answer Solution: (e)
\(\displaystyle \frac{{9125}}{{90\times 9}}=11.26\approx 11\)
Without pen and paper ,
By approximation method, consider 9125 as 9000, which when divided by 90 gives 100 again when the 100 is divided by 9 we can get 11.11. We can get our answer by oral calculation, which will save time.
70) 6666.009 – 585.999 – 79.989 = ?
(a) 5000
(b) 5500
(c) 6500
(d) 6000
(e) 4500
Show Answer
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