81. X men take x/2 hours and doing x/8 unit of work in x/4 days. So y men in y hour how much day will take to do the work like x??

82. W*3^3 + x*3^2 + y.3 + z = 117
what are the possible solution are there??

83. 1/a + 1/b = 1/c all are positive integer and a is a prime number greater than 2 then how many possible combination of (a,b)??
A)0 b)1 c)2 d)4

84. P is a four digit prime number when divided by 12 what will be the remainder??
A) only 6 b)only 4 c)4 & 6

85. 56 toffees have to divided into a, b, c, d, e so that each one gets minimum of 10 toffees. Find the number of ways?

86. An employee may claim rs.7 for each km when he travels by taxi and rs.6 for each km when he drives his own car. If in one week he claimed rs. 595 for travelling km. How many kms did he travels by taxi?
A.55 b.65 c.62 d.70

87. Find the reminder when 50^51^52 is divided with 11

88. Remainder when 33^34^35 divided by 11

89.Remainder when 30^72^87 divided by 11

90.How many 6 digit no can be formed by 0,1,2,3,4,5 so that no is divisible by unit place digit ?