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Not
3. Calculate the following mentally.
(a) 24 x 6
(b) 48 x 7
(c) 6 x 55
(d) 23 x 99
기​

By Charlotte

Not
3. Calculate the following mentally.
(a) 24 x 6
(b) 48 x 7
(c) 6 x 55
(d) 23 x 99
기​

About the author
Charlotte

Sum of n terms of the series ,whose nth term is (2n-1) is
1)n(2n-1)(2n +1)
3)n(n-1)(n+1)
2)n(2n + 1)’ (2n+1)
4

neena and Sunita can do a piece of a work in 8 days, and neena alone can do it in 12 days. how long would Sunita take to do the sa

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