Home/Class 8/Maths/

Question and Answer

The unit digit in the square of the number \(27\) is( )
A. \(7\)
B. \(2\)
C. \(5\)
D. \(9\)
loading
settings
Speed
00:00
02:02
fullscreen

Question

The unit digit in the square of the number \(27\) is( )
A. \(7\)
B. \(2\)
C. \(5\)
D. \(9\)

Answer

D
To Keep Reading This Answer, Download the App
4.6
star pngstar pngstar pngstar pngstar png
Review from Google Play
To Keep Reading This Answer, Download the App
4.6
star pngstar pngstar pngstar pngstar png
Review from Google Play

Solution

Given number is \(27\)
Unit digit of the number \(27\) is \(7\).
Squaring it, we get,
\(= 7^2=7 \times 7 =49\)
\(\therefore\) unit digit of the square of the number \(27\) is \(9\).
To Keep Reading This Solution, Download the APP
4.6
star pngstar pngstar pngstar pngstar png
Review from Google Play
To Keep Reading This Solution, Download the APP
4.6
star pngstar pngstar pngstar pngstar png
Review from Google Play
Correct20
Incorrect0
Watch More Related Solutions
Fill in the Blank:
Five kingdom classification of living organisms is given by ___.
Which of the following statements is incorrect?( )
A. Aluminium is a bright silvery-white metal
B. Aluminium forms alloys with \(Cu, Mn, Mg, Si\) and \(Zn\)
C. The use of aluminium and its compounds for domestic purposes is now increased considerably
D. Both (a) and (b)
Which of them has larger bond angle:\(NH_3, CH_4?\)
\(BF_{3}\) easily reacts with Lewis base such as \(NH_3 \) to complete octet around boron. This can be expressed as ( )
A. \(F_{3}B+: NH_{3}\to F_{3}B\leftarrow NH_{3}\)
B. \(F_{3}B+: NH_{3}\to F_{3}B\rightarrow NH_{3}\)
C. \(:BF_3+NH_{3}\to BF_3\rightarrow NH_{3}\)
D. \(:BF_3+NH_{3}\to BF_3\leftarrow NH_{3}\)
Which of the following has larger bond angle?
\(H_{2}O,H_{2}S\) .
Fill in the blank:
Basic smallest unit of classification is___.
Borax contains the tetranuclear units. Thus, its formula can be written as
( )
A. \([Na_{2}B_{4}O_{5}(OH)_{4}]\cdot 8H_{2}O\)
B. \(Na_{2}[B_{4}O_{5}(OH)_{4}]\cdot 8H_{2}O\)
C. \([Na_{2}B_{4}O_{5}(OH)_{6}]\cdot 6H_{2}O\)
D. None of the above
The unit digit in the square of the number \(78\) is( )
A. \(1\)
B. \(2\)
C. \(3\)
D. \(4\)
Which of the following is most effective electrolyte in the coagulation of \( F{e}_{2}{O}_{3}.{H}_{2}O/F{e}^{3+}\) sol?
\( KCl, AlC{l}_{3}, MgC{l}_{2}, {K}_{4}\left[Fe{\left(CN\right)}_{6}\right]\)
Fill in the blank:
Prokaryotes are grouped in Kingdom ___.

Load More