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Byju's Answer
Standard VIII
Mathematics
Adding Triangular Numbers
Find the Squa...
Question
Find the Square of 531.
A
281961
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B
284681
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C
284371
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D
206451
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Solution
The correct option is
A
281961
531
2
=
(
250
+
31
)
×
1000
+
(
31
)
2
=
281000
+
961
=
281961
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0
Similar questions
Q.
525, 520, 528, ?, 531, 514
Q.
Let
A
+
2
B
=
⎡
⎢
⎣
1
2
0
6
−
3
3
−
5
3
1
⎤
⎥
⎦
and
2
A
−
B
=
⎡
⎢
⎣
2
−
1
5
2
−
1
6
0
1
2
⎤
⎥
⎦
, then find tr(A) - tr(B).
Q.
Let
A
+
2
B
=
⎛
⎜
⎝
1
2
0
6
−
3
3
−
5
3
1
⎤
⎥
⎦
and
2
A
−
B
=
⎛
⎜
⎝
2
−
1
5
2
−
1
6
0
1
2
⎤
⎥
⎦
,
then
find
tr
(
A
)
−
tr
(
B
)
.