The number of permutations by taking all letters and keeping the vowels of the word COMBINE in the odd places is
96
144
512
576
Product of any r consecutive natural numbers is always divisible by
r!
(r + 4)!
(r + 1)!
(r + 2)!
Out of 8 given points, 3 are collinear. How many different straight lines can be drawn by joining any two points from those 8 points ?
26
28
27
25
How many odd numbers of six significant digits can be formed with the digits 0, 1, 2, 5, 6, 7 when no digit is repeated ?
120
96
360
288
The number of ways four boys can be seated around a round-table in four chairs of different colours is
24
12
23
64
The number of times the digit 5 will be written when listing the integers from 1 to 1000, is
271
272
300
None of these