Question
History books are never together.
In how many ways 5 History books and 7 geography books can be arranged in a row so that :Solution
No. of when History books are always together = 5! × 8! Total no. of ways when all the books are arranged without any condition = 12! No. of ways when History book are never together = 12! – (5! × 8!)
111   113   117   120   ?   133
There is a wrong term in the series I named 'P' and the right term which should come at the place of the wrong term is 'Q'. Find the fifth term of seri...
100, 110, ?, 171.6, 240.24, 360.36
16 4 2 1.5 1 1.875
...There are 3 series, you have to find value of a, b, c and then establish relation among a,b,c.
19, 25, 45, a, 553, 2767
1560 760 360 160 6...
200 ? 96 38.4 7.68 0
...49Â Â Â 84Â Â Â 119Â Â Â 154Â Â Â 189Â Â Â ?
28         57           172           689          ?              20677
...Given below are two number series i.e. 'I' and 'II' where the wrong (odd one out) number in each series 'I' and 'II' is 'P' and 'Q', respectively. You h...
504 625 769 938 1134 ?
...
