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We know that the difference of roots is given by {√(b2 – 4ac)}/a, Here, a = 1, b = -13 and c = k Therefore, A – B = (√(b2 – 4ac))/a 5 = (√((-13)2 – 4 x 1 x k))/1 Squaring both the side we get, 25 = 169 – 4k 4k = 169 – 25 k = 144/4 = 36
Choose the number which is different from others in the group.
13, 14, 18, 27, 43, ?
Find the wrong number in the given series.
3 1.5 1.5 ? 4.5 11.25
...1335 737 355 141 47 ?
...Find the 31st term of the series 25, 29, 33……
61 48 ? ...
7, 8, 12, 21, 37, ?
2, 9, 19, 32, 48, 67, ?
4 , 3, 4 , ? , 32
12, 6, 6, 9, 18, ?