Question
Average of four numbers is 18. Sum of smallest and
largest number is 32. If difference between other two numbers is 2, then find the square of second smaller number.Solution
Let four numbers in increasing order is a, b, c and d. => a + b + c + d = 4 x 18 = 72 => a + d = 32 => b + c = 40 According to question, => c – b = 2 => b = 19, c = 21 => b² = 361
If x 8  + x -8  = 194, then find the value of (2x 2  – 4) 2  – 1.
If the sum of three numbers is zero, then which of the options below will always be equal to the value of the sum of the cubes of those numbers?
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...If (x + y + z) = 68, (x/z) = (3/4) and (z/y) = (2/5), then find the value of ‘y’.
`25(2/3)+11(1/9)+16(4/5)xx6(5/12)` = ? - `632/45`
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