Question
If (r + s) = 7 and rs = 15, then find the value of (r² +
s²).Solution
According to the question,
(r + s) ² = 7²
⇒ r² + s² + 2rs = 49
⇒ r² + s² + 2(15) = 49
⇒ r² + s² + 30 = 49
⇒ r² + s² = 49 – 30 = 19
Three series (I, II and III) are given below. Each series contain one odd one out (wrong term) . Wrong term in series I, III and II is denoted by 'P', '...
Two number series are given below, and both follow the same pattern. Series I contains a missing term (m + 18). Find the value of the missing term and ...
28 57 172 689 ? 20677
...112 162 199 ? 242 252
...16 9 ? 13.25 22.625 36.3125
...11, 12, 16, 25, ?, 66
94 282 284 852 856 2562
...Direction: Which of the following will replace ‘?’ in the given question?
5, 18, ‘?’, 126, 296, 586, 1044
520 79 440 151 376 ?
9999 6666 ? 2962.66 1975.11 1316. 74
...
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