If the r^th term in the expansion of contains x⁴ , then r is equal to

The number of permutations of the letters of the word 'CONSEQUENCE' in which all the three E's are together is

The sum of the digits in the unit place of all numbers formed with the help of 3,4,5,6 taken all at a time is

The number of different permutations of the word 'BANANA' is

The number of ways of distributing 8 identical balls in 3 distinct boxes, so that move of the boxes is empty, is

The ninth term of the expansion is

The coefficient of xⁿ in the expansion of (1+2x+3x² +...) is

The coefficient of x in the expansion of (1+x)(1+2x)(1+3x)...(1+100x) is

, then r is

How many 10 digit numbers can be written by suing digits 9 and 2