Question
15 is divided in three parts which are in arithmetic
progression (A.P.) in such a way that the sum of their square is 83. Find the smallest part?Solution
Let the three numbers be (a - d), a, (a + d) a - d + a + a + d = 15 3a = 15 a = 5 (5 - d)² + 5² + (5 + d)² = 83 25 + d² - 10d + 25 + 25 + d² + 10d = 83 2d² = 8 d² = 4 d = ± 2 series = 3,5,7
More DI Questions
Find the missing number in the given number series.
2, 5, 11, 23, 47, ?120, 115, 120, 135, 160, ?
5, 6, 14, 45, ?, 925
? , 864, 432, 144, 36, 7.2
What will come in place of the question mark (?) in the following series?
92, 153, 220, ?, 364, 443
31, 60, 118, 234, 466, ?
166    156    136   ?     66    16
- What will come in place of the question mark (?) in the following series?
6, 6, 9, ?, 32, 56 7    8     ?     13     17     22    28
...- What will come in place of the question mark (?) in the following series?
6, 24, 60, ?, 210, 336
