# 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

761. Find the value of 0.37x0.37 + 1.63x1.63 + 2x0.6031 = ?

Correct Ans:4
Explanation:
Solution is
Given 0.37x0.37 + 1.63x1.63 + 2x0.6031
Formula reference : a2 + b2 + 2 x a x b = ( a + b )2
= (0.37)2+(1.63)2+2 x (0.37) x (1.63)
= (0.37 + 1.63)2
= ( 2 )2
= 4
Workspace

762. Find the value of 0.09x0.09 + 1.41x1.41 + 2x0.1269 = ?

Correct Ans:2.25
Explanation:
Solution is
Given 0.09x0.09 + 1.41x1.41 + 2x0.1269
Formula reference : a2 + b2 + 2 x a x b = ( a + b )2
= (0.09)2+ (1.41)2+ 2 x (0.09) x (1.41)
= (0.09 + 1.41)2
= (1.5)2
= 2.25
Workspace

763. Find the value of 0.29x0.29 + 0.71x0.71 + 2x0.2059 = ?

Correct Ans:1
Explanation:
Solution is
Given 0.29x0.29 + 0.71x0.71 + 2x0.2059
Formula reference : a2 + b2 + 2 x a x b = ( a + b )2
= (0.29)2+ (0.71)2+ 2 x (0.29) x (0.71)
= (0.29 + 0.71)2
= (1)2
= 1
Workspace

764. Find the value of 32.01 - 5.01 + ((27.01 / 8.99) * 2.01) =?

Correct Ans:33
Explanation:
Solution is
= 32.01 - 5.01 + ( ( 27.01 / 8.99 ) * 2.01 )
= 32 - 5 + ( 27 / 9 * 2 )
= 32 - 5 + 3 x 2
= 32 - 5 + 6
= 33
Workspace

765. 13.9 +((9.99 / 4.9) * 6.99) - 4.9 =

Correct Ans:23
Explanation:
13.9 + 9.99 / 4.9 * 6.99 - 4.9 = 14 + 10/5 * 7 - 5 = 14 + 2 * 7 - 5 = 14 + 14 - 5 = 23
Workspace

766. Find the value of 0.51x0.51 + 3.01x3.01 - 2x1.5351 = ?

Correct Ans:6.25
Explanation:
0.51x0.51 + 3.01x3.01 - 2 x 1.5351 = (0.51)^2+(3.01)^2 - 2 x (0.51) x (3.01) = (3.01 - 0.51)^2 =(2.5)^2=6.25 Formula reference : a^2 + b^2 - 2 x a x b = ( a - b )^2
Workspace

767. Find the value of 0.02x0.02 + 1.22x1.22 - 2x0.0244 = ?

Correct Ans:1.44
Explanation:
Solution is
Formula reference : a2 + b2 - 2 x a x b = ( a - b )2

= 0.02x0.02 + 1.22x1.22 - 2 x 0.0244
= (0.02)2+(1.22)2 - 2 x (0.02) x (1.22)
= (1.22 - 0.02)2
= (1.2)2
=1.44
Workspace

768. Find the value of 0.37x0.37 + 1.63x1.63 + 2x0.6031 = ?

Correct Ans:4
Explanation:
0.37x0.37 + 1.63x1.63 + 2x0.6031 = (0.37)^2+(1.63)^2+2 x (0.37) x (1.63) = (0.37 + 1.63)^2 =(2)^2=4 Formula reference : a^2 + b^2 + 2 x a x b = ( a + b )^2
Workspace

769. Find the approximate value of 76.001 % of 1250 + 62 % of 2049.99 = ?

Correct Ans:2221
Explanation:
Given
76.001 % of 1250 + 62 % of 2049.99 = ?
76 % of 1250=>76 x 1250/100 = 950
62 % of 2050=>62 x 2050/100 = 1271
Adding these two values we get,2221
Workspace

770. 21.99 % of 550 + 68.001 % of1100 = ?

Correct Ans:869
Explanation:
22 % of 550=>22 x 550/100 = 121 68 % of 1100=>68 x 1100/100 = 748 Adding these two values we get, Ans : 869
Workspace

771. 71.999 % of 500 + 64 % of2149.9999 = ?

Correct Ans:1736
Explanation:
72 % of 500=>72 x 500/100 = 360 64 % of 2150=>64 x 2150/100 = 1376 Adding these two values we get, Ans : 1736
Workspace

772. Find the value of 0.18x0.18 + 2.68x2.68 - 2x0.4824 = ?

Correct Ans:6.25
Explanation:
0.18x0.18 + 2.68x2.68 - 2 x 0.4824 = (0.18)^2+(2.68)^2 - 2 x (0.18) x (2.68) = (2.68 - 0.18)^2 =(2.5)^2=6.25 Formula reference : a^2 + b^2 - 2 x a x b = ( a - b )^2
Workspace

773. Find the approximate value of 0.09x0.09 + 1.41x1.41 + 2x0.1269 = ?

Correct Ans:2.25
Explanation:
Solution is
Given

0.09x0.09 + 1.41x1.41 + 2x0.1269 = ?
Formula reference : a2 + b2 + 2 x a x b = ( a + b )2
(0.09)2+(1.41)2+2 x (0.09) x (1.41) = (0.09 + 1.41)2 = (1.5)2=2.25
Workspace

774. Find the value of 0.19x0.19 + 1.19x1.19 - 2x0.2261 = ?

Correct Ans:1
Explanation:
0.19x0.19 + 1.19x1.19 - 2 x 0.2261
= (0.19)^2+(1.19)^2 - 2 x (0.19) x (1.19)
= (1.19 - 0.19)^2 =(1)^2=1

Formula reference : a^2 + b^2 - 2 x a x b = ( a - b )^2
Workspace

775. Find the value of 0.04x0.04 + 1.54x1.54 - 2x0.0616 = ?

Correct Ans:2.25
Explanation:
0.04x0.04 + 1.54x1.54 - 2 x 0.0616 = (0.04)^2+(1.54)^2 - 2 x (0.04) x (1.54)
= (1.54 - 0.04)^2 =(1.5)^2=2.25
Formula reference : a^2 + b^2 - 2 x a x b = ( a - b )^2
Workspace

776. Find the value of 0.18x0.18 + 1.18x1.18 - 2x0.2124 = ?

Correct Ans:1
Explanation:
0.18x0.18 + 1.18x1.18 - 2 x 0.2124 = (0.18)^2+(1.18)^2 - 2 x (0.18) x (1.18) = (1.18 - 0.18)^2 =(1)^2=1 Formula reference : a^2 + b^2 - 2 x a x b = ( a - b )^2
Workspace

777. Find the value of 0.53x0.53 + 1.73x1.73 - 2x0.9169 = ?

Correct Ans:1.44
Explanation:
0.53x0.53 + 1.73x1.73 - 2 x 0.9169 = (0.53)^2+(1.73)^2 - 2 x (0.53) x (1.73) = (1.73 - 0.53)^2 =(1.2)^2=1.44 Formula reference : a^2 + b^2 - 2 x a x b = ( a - b )^2
Workspace

778. Find the value of 0.31x0.31 + 1.81x1.81 - 2x0.5611 = ?

Correct Ans:2.25
Explanation:
0.31x0.31 + 1.81x1.81 - 2 x 0.5611 = (0.31)^2+(1.81)^2 - 2 x (0.31) x (1.81) = (1.81 - 0.31)^2 =(1.5)^2=2.25 Formula reference : a^2 + b^2 - 2 x a x b = ( a - b )^2
Workspace

779. Find the value of 0.36x0.36 + 1.36x1.36 - 2x0.4896 = ?

Correct Ans:1
Explanation:
0.36x0.36 + 1.36x1.36 - 2 x 0.4896 = (0.36)^2+(1.36)^2 - 2 x (0.36) x (1.36) = (1.36 - 0.36)^2 =(1)^2=1.44 Formula reference : a^2 + b^2 - 2 x a x b = ( a - b )^2
Workspace

780. Find the value of 0.55x0.55 + 2.55x2.55 - 2x1.4025 = ?

Correct Ans:1
Explanation:
0.55x0.55 + 2.55x2.55 - 2 x 1.4025 = (0.55)^2+(2.55)^2 - 2 x (0.55) x (2.55) = (2.55 - 0.55)^2 =(1)^2=1 Formula reference : a^2 + b^2 - 2 x a x b = ( a - b )^2
Workspace

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