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Q1
:
106 x 106 - 94 x 94 = ?
A
2000
B
1904
C
2400
D
1906
E
None of these
Solution
ANS:
A
- 2400
106 x 106 - 94 x 94
= (106)
2
- (94)
2
= (106 + 94)(106 - 94) [
Ref:
(a
2
- b
2
) = (a + b)(a - b)
]
= (200 x 12)
= 2400.
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