# Approximations Questions and Answers updated daily – Aptitude

Approximations Questions: Solved 780 Approximations Questions and answers section with explanation for various online exam preparation, various interviews, Aptitude Category online test. Category Questions section with detailed description, explanation will help you to master the topic.

## Approximations Questions

741. Approximation 21.9 + ((10.01 / 4.9) * 7.01) - 3.9=?

Correct Ans:32
Explanation:
Solution is:
Given
21.9 + ( ( 10.01 / 4.9 ) * 7.01 ) - 3.9
= 22 + ( ( 10 / 5 ) * 7 ) - 4
= 22 + ( 2 * 7 ) - 4
= 22 + 14 - 4
= 32
Workspace

742. Find the value of 0.37x0.37 + 1.37x1.37 - 2x0.5069 = ?

Correct Ans:1
Explanation:
Solution is:
Given 0.37x0.37 + 1.37x1.37 - 2 x 0.5069
Formula reference : a2 + b2 - 2 x a x b = ( a - b )2
= ( 0.37 )2+ ( 1.37 )2 - 2 x ( 0.37 ) x ( 1.37 )
= ( 1.37 - 0.37 )2
= ( 1 )2
=1
Workspace

743. Find the value of 0.5x0.5 + 0.7x0.7 + 2x0.35 = ?

Correct Ans:1.44
Explanation:
Solution is:
Given 0.5x0.5 + 0.7x0.7 + 2x0.35
Formula reference : a2 + b2 + 2 x a x b = ( a + b )2
= ( 0.5 )2+ ( 0.7 )2+ 2 x ( 0.5 ) x ( 0.7 )
= ( 0.5 + 0.7 )2
= ( 1.2 )2
= 1.44
Workspace

744. Approximation ( ( 10.01 * 34.01 ) / 16.99 ) - 35.01 + 2.01 = ?

Correct Ans:-13
Explanation:
Solution is:
Given
= ( ( 10.01 * 34.01 ) / 16.99 ) - 35.01 + 2.01
= ( ( 10 * 34 ) /17 ) - 35 + 2
= ( 340 / 17 ) - 35 + 2
= 20 - 35 + 2
= -15 + 2
=-13
Workspace

745. Approximation 69.99 % of 1549.99 + 47.99 % of 1200.01 = ?

Correct Ans:1661
Explanation:
Solution is:
70 % of 1550 => 70 * ( 1550 / 100 ) = 1085
48 % of 1200 => 48 * ( 1200 / 100 ) = 576
we get,1085 + 576 = 1661
Ans is 1661
Workspace

746. Approximation 20.99 - 6.01 + ( ( 12.01 / 5.99 ) * 5.01 ) = ?

Correct Ans:25
Explanation:
Solution is:
Given

=20.99 - 6.01 + ( ( 12.01 / 5.99 ) * 5.01 )
= 21 - 6 + ( 12 / 6 ) * 5 )
= 21 - 6 + ( 2 * 5 )
= 21 - 6 + 10
= 25
Workspace

747. Find the value of 0.14x0.14 + 2.14x2.14 - 2x0.2996 = ?

Correct Ans:4
Explanation:
Solution is:
Given 0.14x0.14 + 2.14x2.14 - 2 x 0.2996
Formula reference : a2 + b2 - 2 x a x b = ( a - b )2
= ( 0.14 )2+ ( 2.14 )2 - 2 x ( 0.14 ) x ( 2.14 )
= ( 2.14 - 0.14 )2
= ( 2 )2
= 4
Workspace

748. Find the value of 0.19x0.19 + 1.81x1.81 + 2x0.3439 = ?

Correct Ans:4
Explanation:
Solution is:
Given 0.19x0.19 + 1.81x1.81 + 2x0.3439
Formula reference : a2 + b2 + 2 x a x b = ( a + b )2
= ( 0.19 )2+( 1.81 )2+ 2 x ( 0.19 ) x ( 1.81 )
= ( 0.19 + 1.81 )2
= ( 2 )2
= 4
Workspace

749. Approximation 76.01 % of 1249.99 + 61.99 % of 2050.01 = ?

Correct Ans:2221
Explanation:
Solution is
76.01 % of 1249.99 => 76 % of 1250 =>76 * 1250 / 100 = 950
61.99 % of 2050.01 => 62 % of 2050 => 62 * 2050 / 100 = 1271
we get, 950 + 1271 = 2221
Workspace

750. Approximation ( ( 9.99 * 34.01 ) / 16.99 ) + 34.99 + 1.99 = ?

Correct Ans:57
Explanation:
Solution is
Given ( ( 9.99 * 34.01 ) / 16.99 ) + 34.99 + 1.99
= ( ( 10 * 34 ) / 17 ) + 35 + 2
= ( 340 / 17 ) + 35 + 2
= 20 + 35 + 2
= 57
Workspace

751. Approximation  22.99 - 6.01 + ( ( 32.01 / 15.99 ) * 5.01 ) = ?

Correct Ans:27
Explanation:
Solution is
Given 22.99 - 6.01 + ( ( 32.01 / 15.99 ) * 5.01 )
= 23 - 6 + ( ( 32 / 16 ) * 5 )
= 23 - 6 + ( 2 * 5 )
= 23 - 6 + 10
= 27
Workspace

752. Find the value of 0.26x0.26 + 1.76x1.76 - 2x0.4576 = ?

Correct Ans:2.25
Explanation:
Solution is
Given 0.26x0.26 + 1.76x1.76 - 2 x 0.4576
Formula reference : a2 + b2 - 2 x a x b = ( a - b )2
= ( 0.26 )2+ ( 1.76 )2 - 2 x ( 0.26 ) x ( 1.76 )
= ( 1.76 - 0.26 )2
= ( 1.5 )2
= 2.25
Workspace

753. Find the value of 0.45x0.45 + 2.55x2.55 + 2x1.1475 = ?

Correct Ans:9
Explanation:
Solution is
Given 0.45x0.45 + 2.55x2.55 + 2x1.1475
Formula reference : a2 + b2 + 2 x a x b = ( a + b )2
= ( 0.45 )2+ ( 2.55 )2+2 x ( 0.45 ) x ( 2.55 )
= ( 0.45 + 2.55 )2
= ( 3 )2
= 9
Workspace

754. Approximation 62.01 % of 1049.99 + 35.99 % of 2250.001 = ?

Correct Ans:1461
Explanation:
Solution is
62 % of 1050 => 62 x 1050 / 100 = 651
36 % of 2250 => 36 x 2250 / 100 = 810
Adding these two values we get,
= 651 + 810 = 1461
Ans : 1461
Workspace

755. Approximation ((10.01 * 34.01) / 17.01) + 44.99 + 1.99=?

Correct Ans:67
Explanation:
Solution is
Given ( ( 10.01 * 34.01 ) / 17.01 ) + 44.99 + 1.99
= [ ( 10 * 34 ) / 17 ] + 45 + 2
= [ 340 / 17 } + 45 + 2
= 20 + 45 + 2
= 67
Workspace

756. Approximation 12.99 - 3.01 + ((12.01 / 3.99) * 5.01) =?

Correct Ans:25
Explanation:
Solution is
Given 12.99 - 3.01 + ( ( 12.01 / 3.99 ) * 5.01 )
= 13 - 3 + [ ( 12 / 4 ) * 5 ]
= 13 - 3 + ( 3 * 5 )
= 13 - 3 + 15
= 25
Workspace

757. Find the value of 0.24x0.24 + 3.24x3.24 - 2x0.7776 = ?

Correct Ans:9
Explanation:
Solution is
Given 0.24x0.24 + 3.24x3.24 - 2 x 0.7776
Formula reference : a2 + b2 - 2 x a x b = ( a - b )2
= ( 0.24 )2+( 3.24 )2 - 2 x ( 0.24 ) x ( 3.24 )
= ( 3.24 - 0.24 )2
= ( 3 )2
= 9
Workspace

758. Find the value of 0.24x0.24 + 1.26x1.26 + 2x0.3024 = ?

Correct Ans:2.25
Explanation:
Solution is
Given 0.24x0.24 + 1.26x1.26 + 2x0.3024
Formula reference : a2 + b2 + 2 x a x b = ( a + b )2
= ( 0.24 )2+( 1.26 )2+2 x ( 0.24 ) x ( 1.26 )
= ( 0.24 + 1.26 )2
= ( 1.5 )2
= 2.25
Workspace

759. Find the value of 0.45x0.45 + 2.55x2.55 + 2x1.1475 = ?

Correct Ans:9
Explanation:
Solution is
Given 0.45x0.45 + 2.55x2.55 + 2x1.1475
Formula reference : a2 + b2 + 2 x a x b = ( a + b )2
= ( 0.45 )2+ ( 2.55 )2+2 x ( 0.45 ) x ( 2.55 )
= ( 0.45 + 2.55 )2
= ( 3 )2
= 9
Workspace

760. Find the value of 0.24x0.24 + 1.26x1.26 + 2x0.3024 = ?

Correct Ans:2.25
Explanation:
Solution is
Given 0.24x0.24 + 1.26x1.26 + 2x0.3024
Formula reference : a2 + b2 + 2 x a x b = ( a + b )2
= (0.24)2+(1.26)2+2 x (0.24) x (1.26)
= (0.24 + 1.26)2
= ( 1.5 )2
= 2.25
Workspace

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