How many 3s are there in the following sequence which are neither preceded by 6 nor immediately followed by 9? 9 3 6 6 3 9 5 9 3 7 8 9 1 6 3 9 6 3 9

How many 7's are there in the following number series which are preceded by an even number but not followed by any odd number? 437523721367542742712276572

Which of the following interchanges of numbers would make the given equation correct? 8 x 20 / 3 + 9 - 5 = 38

A number X lies between 0 and 1. Which of the following is true?

If (3a +6b +c +2d) x (3a - 6b - c +2d) = (3a - 6b +c- 2d) x (3a +6b - c- 2d), then which one of the following is correct ?

If bc + cd = 2bd and a + c = 2b, then which one of the following is correct?