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8*3 : 4::6*5 : ?

The marks (out of 10) obtained by 28 students in a Mathematics test are listed as below: 8, 1, 2, 6, 5, 5, 5, 0, 1, 9, 7, 8, 0, 5, 8, 3, 0, 8, 10, 10, 3, 4, 8, 7, 8, 9, 2, 0 The number of students who obtained marks more than or equal to 5 is

How much such numbers are there in the following series, each of which is immediately preceded by 6 3 8 6 8 4 2 6 9 8 4 8 6 2 6 8 4 8 1) None 2) 1 3) 2 4) 3 5) More than three

6 6 8 5 5 3 7 3 7 2 5 8 8 7 8 1 5 5 3 How many 5 are there in the above sequence that are completely divisible by the number on their left but not divisible by the number on their right?

3 2 8 4 3 8 5 4 6 2 1 8 3 5 8 7 9 8 6 3 8 2 7 0 8 5 1 8 8 9 7 4 In the above sequence in some cases the multiplication of the two digits which immediately precede the digit 8 exceeds the addition of the two digit which immediately follow that digit. How many such 8's are there ? 1) 3 2) 4 3) 5 4) 6 5) None of these

Evaluate : 3/8 ÷ ( 5/3 - 1/6 ) + 5/8 is equal to

Data :   4 , 7 ,9 , 3 , 4 , 5, 3 , 6 ,7 ,6 ,8 , 6 ,7 , 6 , 5 , 6 ,8 , 6 , 5 and 4 ; then find the mode

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What should come next in the following series? 9 8 7 6 5 4 3 2 1 9 8 7 6 5 4 3 2 9 8 7 6 5 4 3 9 8 7 6 5 4 9 8 7 ?

Evaluate : [ ( 7/-8 ) + ( -5/6 ) ] times 3/4 = ( 7/-8 ) times 3/4 + ( -5 /6 ) times 3/4